[Android] Performance issues with CollectionView using grouping and variable sizes

[jsuarezruiz]

Description

Performance issues with CollectionView using grouping and variable sizes.

Steps to Reproduce

1. Sync or download https://github.com/dotnet/maui-samples/tree/main/8.0/UserInterface/Views/CollectionViewDemos
2. Launch the App on Android.
3. Navigate to Grouping with variable sized items.

Link to public reproduction project repository

https://github.com/dotnet/maui-samples/tree/main/8.0/UserInterface/Views/CollectionViewDemos

Version with bug

8.0.21 SR4.1

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android 14

Did you find any workaround?

No response

Relevant log output

No response

[github-actions]

Hi I'm an AI powered bot that finds similar issues based off the issue title.

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

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• CollectionView with IsGrouped and GridItemsLayout performance issue with Images (#18881), similarity score: 0.82
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[jsuarezruiz]

I didn't realize, but the issue is because use the following hierarchy:

StackLayout > CollectionView

Changing it by:

Grid > CollectionView

Fixes the performance. However, after the changes and scrolling:

[PureWeen]

Duplicate of #18834