Description

Basically this from Xamarin.Forms: xamarin/Xamarin.Forms#10389

Copy/Paste:
When a CollectionView's IsGrouped property is set to true, the values of FirstVisibleItemIndex, CenterItemIndex, and LastVisibleItemIndex specified in the ItemsViewScrolledEventArgs passed to the Scrolled event handler are incorrect. They appear to be unable to reflect the indicies of any items beyond the first group.

Steps to Reproduce

1. Run the iOS app.
2. Scroll the list.
3. See Label with text from FirstVisibleItemIndex not updating

Link to public reproduction project repository

https://github.com/Matmork/CollectionViewScroll

Version with bug

8.0.0-rc.1.9171

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 response

Relevant log output

No response