CollectionView with grouped data crashes on iOS when the groups change.

### Description

On iOS, when a CollectionView is bound to GroupedData, and is on a non-visible Page, updates to the grouped data can cause a crash.  The same scenario run on WinUI and Android does not crash.

Error occurs on iOS with all Microsoft.Maui.Controls v9.x releases, including the latest 9.0.40.

Scenario mimics logic our company uses in a real world application.  The approach worked at the ViewModel level in our application using Xamarin.Forms.  However, our application was using ListView in XF, whereas we're using CollectionView in MAUI.

### Steps to Reproduce

1. Run the iOS version of the application in https://github.com/michaelb-yambay/MauiCollectionViewGroupChanging
2. Should see a 'TODO' group with 'Mow Lawn', and a 'DONE' group with 2 other rows.
3. For the 'Mow Lawn' row, tap 'Details'
4. Within the DetailPage, tap the 'ACTIVE' button - work item will now be ACTIVE, and the groups will be updated in MainViewModel&MainPage.
5. Staying on the DetailPage, tap the 'TODO' button.

Above scenario crashes on iOS.  Running the same for WinUI and Android does not crash.

https://github.com/michaelb-yambay/MauiCollectionViewGroupChanging/blob/main/README.md contains the error stack trace.

![Image](https://github.com/user-attachments/assets/08d8fbee-92df-43a3-b043-46a1803b6258)


### Link to public reproduction project repository

https://github.com/michaelb-yambay/MauiCollectionViewGroupChanging

### Version with bug

9.0.40 SR4

### Is this a regression from previous behavior?

No, this is something new

### Last version that worked well

Unknown/Other

### Affected platforms

iOS

### Affected platform versions

_No response_

### Did you find any workaround?

No workaround discovered yet.

### Relevant log output

```shell
2025-02-14 11:23:37.989228+0000 MauiCollectionViewGroupChanging.iOS[17426:2337379] [general] *** Assertion failure in -[Microsoft_Maui_Controls_Handlers_Items_MauiCollectionView _validateSortedDeleteItems:moveItems:movedSourceIndexPaths:movedDestinationIndexPaths:insertItems:oldCollectionViewData:], UICollectionView.m:10861
**ObjCRuntime.ObjCException:** 'Loading...'

**ObjCRuntime.ObjCException:** 'Objective-C exception thrown.  Name: NSInternalInconsistencyException Reason: attempt to delete item 0 from section 0 which only contains 0 items before the update
Native stack trace:
	0   CoreFoundation                      0x00000001804b910c __exceptionPreprocess + 172
	1   libobjc.A.dylib                     0x0000000180092da8 objc_exception_throw + 72
	2   Foundation                          0x0000000180e67c70 _userInfoForFileAndLine + 0
	3   UIKitCore                           0x0000000185246f50 -[UICollectionView _endItemAnimationsWithInvalidationContext:tentativelyForReordering:animator:collectionViewAnimator:] + 4100
	4   UIKitCore                           0x000000018524518c -[UICollectionView _updateRowsAtIndexPaths:updateAction:updates:] + 436
	5   UIKitCore                           0x000000018524532c -[UICollectionView deleteItemsAtIndexPaths:] + 48
	6   UIKit                               0x00000001cbee586c -[UICollectionViewAccessibility deleteItemsAtIndexPaths:] + 92
	7   libxamarin-dotnet-debug.dylib       0x0000000105792d4c xamarin_dyn_objc_msgSendSuper + 164
	8   libmonosgen-2.0.dylib               0x0000000105aff668 do_icall + 200
	9   libmonosgen-2.0.dylib               0x0000000105afdc00 do_icall_wrapper + 356
	10  libmonosgen-2.0.dylib               0x0000000105af32f4 mono_interp_exec_method + 2824
	11  libmonosgen-2.0.dylib               0x0000000105af0dbc interp_runtime_invoke + 244
	12  libmonosgen-2.0.dylib               0x0000000105a0c914 mono_jit_runtime_invoke + 1244
	13  libmonosgen-2.0.dylib               0x0000000105bcb894 mono_runtime_try_invoke + 156
	14  libmonosgen-2.0.dylib               0x0000000105bcda30 mono_runtime_invoke + 484
	15  MauiCollectionViewGroupChanging.iOS 0x00000001044337c4 _ZL30native_to_managed_trampoline_9P11objc_objectP13objc_selectorPP11_MonoMethodj + 316
	16  MauiCollectionViewGroupChanging.iOS 0x00000001044863f4 -[UIKit_UIControlEventProxy BridgeSelector] + 44
	17  UIKitCore                           0x0000000185b36e3c -[UIApplication sendAction:to:from:forEvent:] + 96
	18  UIKitCore                           0x000000018540c830 -[UIControl sendAction:to:forEvent:] + 108
	19  UIKitCore                           0x000000018540cb74 -[UIControl _sendActionsForEvents:withEvent:] + 268
	20  UIKitCore                           0x00000001854095ec -[UIButton _sendActionsForEvents:withEvent:] + 120
	21  UIKitCore                           0x000000018540b80c -[UIControl touchesEnded:withEvent:] + 392
	22  UIKitCore                           0x0000000185b6aa10 -[UIWindow _sendTouchesForEvent:] + 972
	23  UIKitCore                           0x0000000185b6be20 -[UIWindow sendEvent:] + 2840
	24  UIKitCore                           0x0000000185b4b80c -[UIApplication sendEvent:] + 376
	25  UIKit                               0x00000001cbedd2fc -[UIApplicationAccessibility sendEvent:] + 108
	26  UIKitCore                           0x0000000185bd5c70 __dispatchPreprocessedEventFromEventQueue + 1156
	27  UIKitCore                           0x0000000185bd8c00 __processEventQueue + 5592
	28  UIKitCore                           0x0000000185bd0f10 updateCycleEntry + 156
	29  UIKitCore                           0x00000001850a5cec _UIUpdateSequenceRun + 76
	30  UIKitCore                           0x0000000185a60858 schedulerStepScheduledMainSection + 168
	31  UIKitCore                           0x0000000185a5fc90 runloopSourceCallback + 80
	32  CoreFoundation                      0x000000018041d294 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
	33  CoreFoundation                      0x000000018041d1dc __CFRunLoopDoSource0 + 172
	34  CoreFoundation                      0x000000018041c940 __CFRunLoopDoSources0 + 232
	35  CoreFoundation                      0x0000000180416e84 __CFRunLoopRun + 788
	36  CoreFoundation                      0x00000001804166f4 CFRunLoopRunSpecific + 552
	37  GraphicsServices                    0x00000001905e5b10 GSEventRunModal + 160
	38  UIKitCore                           0x0000000185b319dc -[UIApplication _run] + 796
	39  UIKitCore                           0x0000000185b35bd4 UIApplicationMain + 124
	40  libxamarin-dotnet-debug.dylib       0x0000000105751288 xamarin_UIApplicationMain + 60
	41  libmonosgen-2.0.dylib               0x0000000105aff6dc do_icall + 316
	42  libmonosgen-2.0.dylib               0x0000000105afdc00 do_icall_wrapper + 356
	43  libmonosgen-2.0.dylib               0x0000000105af32f4 mono_interp_exec_method + 2824
	44  libmonosgen-2.0.dylib               0x0000000105af0dbc interp_runtime_invoke + 244
	45  libmonosgen-2.0.dylib               0x0000000105a0c914 mono_jit_runtime_invoke + 1244
	46  libmonosgen-2.0.dylib               0x0000000105bc9e90 mono_runtime_invoke_checked + 148
	47  libmonosgen-2.0.dylib               0x0000000105bd10f0 mono_runtime_exec_main_checked + 116
	48  libmonosgen-2.0.dylib               0x0000000105a5f9a4 mono_jit_exec + 364
	49  libxamarin-dotnet-debug.dylib       0x0000000105791bac xamarin_main + 2312
	50  MauiCollectionViewGroupChanging.iOS 0x00000001044ded50 main + 64
	51  dyld                                0x0000000105115410 start_sim + 20
	52  ???                                 0x0000000105262274 0x0 + 4381352564
'

2025-02-14 11:23:47.058524+0000 MauiCollectionViewGroupChanging.iOS[17426:2337379] 
Unhandled Exception:
ObjCRuntime.ObjCException: Objective-C exception thrown.  Name: NSInternalInconsistencyException Reason: attempt to delete item 0 from section 0 which only contains 0 items before the update
Native stack trace:
	0   CoreFoundation                      0x00000001804b910c __exceptionPreprocess + 172
	1   libobjc.A.dylib                     0x0000000180092da8 objc_exception_throw + 72
	2   Foundation                          0x0000000180e67c70 _userInfoForFileAndLine + 0
	3   UIKitCore                           0x0000000185246f50 -[UICollectionView _endItemAnimationsWithInvalidationContext:tentativelyForReordering:animator:collectionViewAnimator:] + 4100
	4   UIKitCore                           0x000000018524518c -[UICollectionView _updateRowsAtIndexPaths:updateAction:updates:] + 436
	5   UIKitCore                           0x000000018524532c -[UICollectionView deleteItemsAtIndexPaths:] + 48
	6   UIKit                               0x00000001cbee586c -[UICollectionViewAccessibility deleteItemsAtIndexPaths:] + 92
	7   libxamarin-dotnet-debug.dylib       0x0000000105792d4c xamarin_dyn_objc_msgSendSuper + 164
	8   libmonosgen-2.0.dylib               0x0000000105aff668 do_icall + 200
	9   libmonosgen-2.0.dylib               0x0000000105afdc00 do_icall_wrapper + 356
	10  libmonosgen-2.0.dylib               0x0000000105af32f4 mono_interp_exec_method + 2824
	11  libmonosgen-2.0.dylib               0x0000000105af0dbc interp_runtime_invoke + 244
	12  libmonosgen-2.0.dylib               0x0000000105a0c914 mono_jit_runtime_invoke + 1244
	13  libmonosgen-2.0.dylib               0x0000000105bcb894 mono_runtime_try_invoke + 156
	14  libmonosgen-2.0.dylib               0x0000000105bcda30 mono_runtime_invoke + 484
	15  MauiCollectionViewGroupChanging.iOS 0x00000001044337c4 _ZL30native_to_managed_trampoline_9P11objc_objectP13objc_selectorPP11_MonoMethodj + 316
	16  MauiCollectionViewGroupChanging.iOS 0x00000001044863f4 -[UIKit_UIControlEventProxy BridgeSelector] + 44
	17  UIKitCore                           0x0000000185b36e3c -[UIApplication sendAction:to:from:forEvent:] + 96
	18  UIKitCore                           0x000000018540c830 -[UIControl sendAction:to:forEvent:] + 108
	19  UIKitCore                           0x000000018540cb74 -[UIControl _sendActionsForEvents:withEvent:] + 268
	20  UIKitCore                           0x00000001854095ec -[UIButton _sendActionsForEvents:withEvent:] + 120
	21  UIKitCore                           0x000000018540b80c -[UIControl touchesEnded:withEvent:] + 392
	22  UIKitCore                           0x0000000185b6aa10 -[UIWindow _sendTouchesForEvent:] + 972
	23  UIKitCore                           0x0000000185b6be20 -[UIWindow sendEvent:] + 2840
	24  UIKitCore                           0x0000000185b4b80c -[UIApplication sendEvent:] + 376
	25  UIKit                               0x00000001cbedd2fc -[UIApplicationAccessibility sendEvent:] + 108
	26  UIKitCore                           0x0000000185bd5c70 __dispatchPreprocessedEventFromEventQueue + 1156
	27  UIKitCore                           0x0000000185bd8c00 __processEventQueue + 5592
	28  UIKitCore                           0x0000000185bd0f10 updateCycleEntry + 156
	29  UIKitCore                           0x00000001850a5cec _UIUpdateSequenceRun + 76
	30  UIKitCore                           0x0000000185a60858 schedulerStepScheduledMainSection + 168
	31  UIKitCore                           0x0000000185a5fc90 runloopSourceCallback + 80
	32  CoreFoundation                      0x000000018041d294 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
	33  CoreFoundation                      0x000000018041d1dc __CFRunLoopDoSource0 + 172
	34  CoreFoundation                      0x000000018041c940 __CFRunLoopDoSources0 + 232
	35  CoreFoundation                      0x0000000180416e84 __CFRunLoopRun + 788
	36  CoreFoundation                      0x00000001804166f4 CFRunLoopRunSpecific + 552
	37  GraphicsServices                    0x00000001905e5b10 GSEventRunModal + 160
	38  UIKitCore                           0x0000000185b319dc -[UIApplication _run] + 796
	39  UIKitCore                           0x0000000185b35bd4 UIApplicationMain + 124
	40  libxamarin-dotnet-debug.dylib       0x0000000105751288 xamarin_UIApplicationMain + 60
	41  libmonosgen-2.0.dylib               0x0000000105aff6dc do_icall + 316
	42  libmonosgen-2.0.dylib               0x0000000105afdc00 do_icall_wrapper + 356
	43  libmonosgen-2.0.dylib               0x0000000105af32f4 mono_interp_exec_method + 2824
	44  libmonosgen-2.0.dylib               0x0000000105af0dbc interp_runtime_invoke + 244
	45  libmonosgen-2.0.dylib               0x0000000105a0c914 mono_jit_runtime_invoke + 1244
	46  libmonosgen-2.0.dylib               0x0000000105bc9e90 mono_runtime_invoke_checked + 148
	47  libmonosgen-2.0.dylib               0x0000000105bd10f0 mono_runtime_exec_main_checked + 116
	48  libmonosgen-2.0.dylib               0x0000000105a5f9a4 mono_jit_exec + 364
	49  libxamarin-dotnet-debug.dylib       0x0000000105791bac xamarin_main + 2312
	50  MauiCollectionViewGroupChanging.iOS 0x00000001044ded50 main + 64
	51  dyld                                0x0000000105115410 start_sim + 20
	52  ???                                 0x0000000105262274 0x0 + 4381352564

   at ObjCRuntime.Runtime.ThrowException(IntPtr gchandle) in /Users/builder/azdo/_work/9/s/xamarin-macios/src/ObjCRuntime/Runtime.cs:line 2742
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/9/s/xamarin-macios/src/UIKit/UIApplication.cs:line 64
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/9/s/xamarin-macios/src/UIKit/UIApplication.cs:line 96
   at MauiCollectionViewGroupChanging.iOS.Program.Main(String[] args) in D:\Projects\Test\MauiCollectionViewGroupChanging\MauiCollectionViewGroupChanging.iOS\Main.cs:line 13
Native stack trace:
	0   CoreFoundation                      0x00000001804b910c __exceptionPreprocess + 172
	1   libobjc.A.dylib                     0x0000000180092da8 objc_exception_throw + 72
	2   Foundation                          0x0000000180e67c70 _userInfoForFileAndLine + 0
	3   UIKitCore                           0x0000000185246f50 -[UICollectionView _endItemAnimationsWithInvalidationContext:tentativelyForReordering:animator:collectionViewAnimator:] + 4100
	4   UIKitCore                           0x000000018524518c -[UICollectionView _updateRowsAtIndexPaths:updateAction:updates:] + 436
	5   UIKitCore                           0x000000018524532c -[UICollectionView deleteItemsAtIndexPaths:] + 48
	6   UIKit                               0x00000001cbee586c -[UICollectionViewAccessibility deleteItemsAtIndexPaths:] + 92
	7   libxamarin-dotnet-debug.dylib       0x0000000105792d4c xamarin_dyn_objc_msgSendSuper + 164
	8   libmonosgen-2.0.dylib               0x0000000105aff668 do_icall + 200
	9   libmonosgen-2.0.dylib               0x0000000105afdc00 do_icall_wrapper + 356
	10  libmonosgen-2.0.dylib               0x0000000105af32f4 mono_interp_exec_method + 2824
	11  libmonosgen-2.0.dylib               0x0000000105af0dbc interp_runtime_invoke + 244
	12  libmonosgen-2.0.dylib               0x0000000105a0c914 mono_jit_runtime_invoke + 1244
	13  libmonosgen-2.0.dylib               0x0000000105bcb894 mono_runtime_try_invoke + 156
	14  libmonosgen-2.0.dylib               0x0000000105bcda30 mono_runtime_invoke + 484
	15  MauiCollectionViewGroupChanging.iOS 0x00000001044337c4 _ZL30native_to_managed_trampoline_9P11objc_objectP13objc_selectorPP11_MonoMethodj + 316
	16  MauiCollectionViewGroupChanging.iOS 0x00000001044863f4 -[UIKit_UIControlEventProxy BridgeSelector] + 44
	17  UIKitCore                           0x0000000185b36e3c -[UIApplication sendAction:to:from:forEvent:] + 96
	18  UIKitCore                           0x000000018540c830 -[UIControl sendAction:to:forEvent:] + 108
	19  UIKitCore                           0x000000018540cb74 -[UIControl _sendActionsForEvents:withEvent:] + 268
	20  UIKitCore                           0x00000001854095ec -[UIButton _sendActionsForEvents:withEvent:] + 120
	21  UIKitCore                           0x000000018540b80c -[UIControl touchesEnded:withEvent:] + 392
	22  UIKitCore                           0x0000000185b6aa10 -[UIWindow _sendTouchesForEvent:] + 972
	23  UIKitCore                           0x0000000185b6be20 -[UIWindow sendEvent:] + 2840
	24  UIKitCore                           0x0000000185b4b80c -[UIApplication sendEvent:] + 376
	25  UIKit                               0x00000001cbedd2fc -[UIApplicationAccessibility sendEvent:] + 108
	26  UIKitCore                           0x0000000185bd5c70 __dispatchPreprocessedEventFromEventQueue + 1156
	27  UIKitCore                           0x0000000185bd8c00 __processEventQueue + 5592
	28  UIKitCore                           0x0000000185bd0f10 updateCycleEntry + 156
	29  UIKitCore                           0x00000001850a5cec _UIUpdateSequenceRun + 76
	30  UIKitCore                           0x0000000185a60858 schedulerStepScheduledMainSection + 168
	31  UIKitCore                           0x0000000185a5fc90 runloopSourceCallback + 80
	32  CoreFoundation                      0x000000018041d294 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
	33  CoreFoundation                      0x000000018041d1dc __CFRunLoopDoSource0 + 172
	34  CoreFoundation                      0x000000018041c940 __CFRunLoopDoSources0 + 232
	35  CoreFoundation                      0x0000000180416e84 __CFRunLoopRun + 788
	36  CoreFoundation                      0x00000001804166f4 CFRunLoopRunSpecific + 552
	37  GraphicsServices                    0x00000001905e5b10 GSEventRunModal + 160
	38  UIKitCore                           0x0000000185b319dc -[UIApplication _run] + 796
	39  UIKitCore                           0x0000000185b35bd4 UIApplicationMain + 124
	40  libxamarin-dotnet-debug.dylib       0x0000000105751288 xamarin_UIApplicationMain + 60
	41  libmonosgen-2.0.dylib               0x0000000105aff6dc do_icall + 316
	42  libmonosgen-2.0.dylib               0x0000000105afdc00 do_icall_wrapper + 356
	43  libmonosgen-2.0.dylib               0x0000000105af32f4 mono_interp_exec_method + 2824
	44  libmonosgen-2.0.dylib               0x0000000105af0dbc interp_runtime_invoke + 244
	45  libmonosgen-2.0.dylib               0x0000000105a0c914 mono_jit_runtime_invoke + 1244
	46  libmonosgen-2.0.dylib               0x0000000105bc9e90 mono_runtime_invoke_checked + 148
	47  libmonosgen-2.0.dylib               0x0000000105bd10f0 mono_runtime_exec_main_checked + 116
	48  libmonosgen-2.0.dylib               0x0000000105a5f9a4 mono_jit_exec + 364
	49  libxamarin-dotnet-debug.dylib       0x0000000105791bac xamarin_main + 2312
	50  MauiCollectionViewGroupChanging.iOS 0x00000001044ded50 main + 64
	51  dyld                                0x0000000105115410 start_sim + 20
	52  ???                                 0x0000000105262274 0x0 + 4381352564
2025-02-14 11:23:47.061997+0000 MauiCollectionViewGroupChanging.iOS[17426:2337379] Unhandled managed exception: Objective-C exception thrown.  Name: NSInternalInconsistencyException Reason: attempt to delete item 0 from section 0 which only contains 0 items before the update
Native stack trace:
	0   CoreFoundation                      0x00000001804b910c __exceptionPreprocess + 172
	1   libobjc.A.dylib                     0x0000000180092da8 objc_exception_throw + 72
	2   Foundation                          0x0000000180e67c70 _userInfoForFileAndLine + 0
	3   UIKitCore                           0x0000000185246f50 -[UICollectionView _endItemAnimationsWithInvalidationContext:tentativelyForReordering:animator:collectionViewAnimator:] + 4100
	4   UIKitCore                           0x000000018524518c -[UICollectionView _updateRowsAtIndexPaths:updateAction:updates:] + 436
	5   UIKitCore                           0x000000018524532c -[UICollectionView deleteItemsAtIndexPaths:] + 48
	6   UIKit                               0x00000001cbee586c -[UICollectionViewAccessibility deleteItemsAtIndexPaths:] + 92
	7   libxamarin-dotnet-debug.dylib       0x0000000105792d4c xamarin_dyn_objc_msgSendSuper + 164
	8   libmonosgen-2.0.dylib               0x0000000105aff668 do_icall + 200
	9   libmonosgen-2.0.dylib               0x0000000105afdc00 do_icall_wrapper + 356
	10  libmonosgen-2.0.dylib               0x0000000105af32f4 mono_interp_exec_method + 2824
	11  libmonosgen-2.0.dylib               0x0000000105af0dbc interp_runtime_invoke + 244
	12  libmonosgen-2.0.dylib               0x0000000105a0c914 mono_jit_runtime_invoke + 1244
	13  libmonosgen-2.0.dylib               0x0000000105bcb894 mono_runtime_try_invoke + 156
	14  libmonosgen-2.0.dylib               0x0000000105bcda30 mono_runtime_invoke + 484
	15  MauiCollectionViewGroupChanging.iOS 0x00000001044337c4 _ZL30native_to_managed_trampoline_9P11objc_objectP13objc_selectorPP11_MonoMethodj + 316
	16  MauiCollectionViewGroupChanging.iOS 0x00000001044863f4 -[UIKit_UIControlEventProxy BridgeSelector] + 44
	17  UIKitCore                           0x0000000185b36e3c -[UIApplication sendAction:to:from:forEvent:] + 96
	18  UIKitCore                           0x000000018540c830 -[UIControl sendAction:to:forEvent:] + 108
	19  UIKitCore                           0x000000018540cb74 -[UIControl _sendActionsForEvents:withEvent:] + 268
	20  UIKitCore                           0x00000001854095ec -[UIButton _sendActionsForEvents:withEvent:] + 120
	21  UIKitCore                           0x000000018540b80c -[UIControl touchesEnded:withEvent:] + 392
	22  UIKitCore                           0x0000000185b6aa10 -[UIWindow _sendTouchesForEvent:] + 972
	23  UIKitCore                           0x0000000185b6be20 -[UIWindow sendEvent:] + 2840
	24  UIKitCore                           0x0000000185b4b80c -[UIApplication sendEvent:] + 376
	25  UIKit                               0x00000001cbedd2fc -[UIApplicationAccessibility sendEvent:] + 108
	26  UIKitCore                           0x0000000185bd5c70 __dispatchPreprocessedEventFromEventQueue + 1156
	27  UIKitCore                           0x0000000185bd8c00 __processEventQueue + 5592
	28  UIKitCore                           0x0000000185bd0f10 updateCycleEntry + 156
	29  UIKitCore                           0x00000001850a5cec _UIUpdateSequenceRun + 76
	30  UIKitCore                           0x0000000185a60858 schedulerStepScheduledMainSection + 168
	31  UIKitCore                           0x0000000185a5fc90 runloopSourceCallback + 80
	32  CoreFoundation                      0x000000018041d294 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
	33  CoreFoundation                      0x000000018041d1dc __CFRunLoopDoSource0 + 172
	34  CoreFoundation                      0x000000018041c940 __CFRunLoopDoSources0 + 232
	35  CoreFoundation                      0x0000000180416e84 __CFRunLoopRun + 788
	36  CoreFoundation                      0x00000001804166f4 CFRunLoopRunSpecific + 552
	37  GraphicsServices                    0x00000001905e5b10 GSEventRunModal + 160
	38  UIKitCore                           0x0000000185b319dc -[UIApplication _run] + 796
	39  UIKitCore                           0x0000000185b35bd4 UIApplicationMain + 124
	40  libxamarin-dotnet-debug.dylib       0x0000000105751288 xamarin_UIApplicationMain + 60
	41  libmonosgen-2.0.dylib               0x0000000105aff6dc do_icall + 316
	42  libmonosgen-2.0.dylib               0x0000000105afdc00 do_icall_wrapper + 356
	43  libmonosgen-2.0.dylib               0x0000000105af32f4 mono_interp_exec_method + 2824
	44  libmonosgen-2.0.dylib               0x0000000105af0dbc interp_runtime_invoke + 244
	45  libmonosgen-2.0.dylib               0x0000000105a0c914 mono_jit_runtime_invoke + 1244
	46  libmonosgen-2.0.dylib               0x0000000105bc9e90 mono_runtime_invoke_checked + 148
	47  libmonosgen-2.0.dylib               0x0000000105bd10f0 mono_runtime_exec_main_checked + 116
	48  libmonosgen-2.0.dylib               0x0000000105a5f9a4 mono_jit_exec + 364
	49  libxamarin-dotnet-debug.dylib       0x0000000105791bac xamarin_main + 2312
	50  MauiCollectionViewGroupChanging.iOS 0x00000001044ded50 main + 64
	51  dyld                                0x0000000105115410 start_sim + 20
	52  ???                                 0x0000000105262274 0x0 + 4381352564
 (ObjCRuntime.ObjCException)
   at ObjCRuntime.Runtime.ThrowException(IntPtr gchandle) in /Users/builder/azdo/_work/9/s/xamarin-macios/src/ObjCRuntime/Runtime.cs:line 2742
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/9/s/xamarin-macios/src/UIKit/UIApplication.cs:line 64
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/9/s/xamarin-macios/src/UIKit/UIApplication.cs:line 96
   at MauiCollectionViewGroupChanging.iOS.Program.Main(String[] args) in D:\Projects\Test\MauiCollectionViewGroupChanging\MauiCollectionViewGroupChanging.iOS\Main.cs:line 13

=================================================================
	Native Crash Reporting
=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

=================================================================
	Native stacktrace:
=================================================================
	0x105aef878 - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/libmonosgen-2.0.dylib : mono_dump_native_crash_info
	0x105a9c63c - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/libmonosgen-2.0.dylib : mono_handle_native_crash
	0x105c673c0 - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/libmonosgen-2.0.dylib : sigabrt_signal_handler.cold.1
	0x105aef15c - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/libmonosgen-2.0.dylib : mono_runtime_setup_stat_profiler
	0x1053d03c0 - /usr/lib/system/libsystem_platform.dylib : _sigtramp
	0x10541b408 - /usr/lib/system/libsystem_pthread.dylib : pthread_kill
	0x1801704ec - /Library/Developer/CoreSimulator/Volumes/iOS_22C150/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.2.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/libsystem_c.dylib : abort
	0x10577c984 - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/libxamarin-dotnet-debug.dylib : xamarin_find_protocol_wrapper_type
	0x105b7fac8 - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/libmonosgen-2.0.dylib : mono_invoke_unhandled_exception_hook
	0x105a5f9cc - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/libmonosgen-2.0.dylib : mono_jit_exec
	0x105791bac - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/libxamarin-dotnet-debug.dylib : xamarin_main
	0x1044ded50 - /Users/michael/Library/Developer/CoreSimulator/Devices/70115689-3898-4F0F-93E5-861C8E4379A4/data/Containers/Bundle/Application/692A8BF7-FDD4-402F-8867-A53074C126D3/MauiCollectionViewGroupChanging.iOS.app/MauiCollectionViewGroupChanging.iOS : main
	0x105115410 - Unknown
	0x105262274 - Unknown

=================================================================
	Basic Fault Address Reporting
=================================================================
Memory around native instruction pointer (0x1056bd108):0x1056bd0f8  c0 03 5f d6 c0 03 5f d6 10 29 80 d2 01 10 00 d4  .._..._..)......
0x1056bd108  e3 00 00 54 fd 7b bf a9 fd 03 00 91 ee e2 ff 97  ...T.{..........
0x1056bd118  bf 03 00 91 fd 7b c1 a8 c0 03 5f d6 c0 03 5f d6  .....{...._..._.
0x1056bd128  70 0a 80 d2 01 10 00 d4 e3 00 00 54 fd 7b bf a9  p..........T.{..

=================================================================
	Managed Stacktrace:
=================================================================
=================================================================
```

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CollectionView with grouped data crashes on iOS when the groups change. #27797

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CollectionView with grouped data crashes on iOS when the groups change. #27797

Description

Description

Steps to Reproduce

Link to public reproduction project repository

Version with bug

Is this a regression from previous behavior?

Last version that worked well

Affected platforms

Affected platform versions

Did you find any workaround?

Relevant log output

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