Description

Issue 1: When CollectionView has grouping enabled and includes a footer template, newly added items are not reflected in the view.

Issue 2: Using CollectionView with grouping causes an exception when clearing and adding items.

Steps to Reproduce

1. Run the project
2. Click on Add to reproduce issue 1.
3. Notice only count is increased but item is not added in the view.
4. Click on clear to reproduce issue 2.
5. Notice the app will crash

Link to public reproduction project repository

https://github.com/daniel-c/MauiGroupedCollectionTest

Version with bug

8.0.90 SR9

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Output

Relevant log output

No response