CollectionView SelectedItem loses Background after opening and closing a Modal page

[jgon34]

Description

Changing CollectionView SelectedItem BackgroundColor using VisualStateManager does not seem to be working properly on iOS. If an item is in the Selected state and we change the background color, open a modal page, then close that modal page, the SelectedItem no longer has the background color that was previously set.

Steps to Reproduce

1. Run linked github project
2. Select an item in the list
3. Click "Click Me" button to open a modal page
4. Click "click me" button on the modal page to close it
5. SelectedItem on MainPage loses background color

Link to public reproduction project repository

https://github.com/jgon34/maui-bug

Version with bug

8.0.20 SR4

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 17.2

Did you find any workaround?

Use async messaging bus to send message back to underlying page to re-select the item when the modal is dismissed.

Relevant log output

No response

Example gif:

[github-actions]

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[Zhanglirong-Winnie]

Verified this issue with Visual Studio 17.10 Preview 7.0(8.0.40&8.0.21&8.0.20&8.0.14&8.0.3). Can repro on iOS platform with sample project.