[Windows] KeepLastItemInView Does Not Scroll to Last Item When Adding Items at Top, Instead Scrolls to SecondLast Item

[NafeelaNazhir]

Description

On Windows, when using [ItemsUpdatingScrollMode.KeepLastItemInView] with a CollectionView, the view does not consistently scroll to the last item after inserting new items at the top. Instead, it scrolls to the second-to-last item. The last item becomes visible only after manually scrolling to the bottom. This behavior is inconsistent in certain scenarios. If the visible content is already at the topmost position and new items are added at the top, the CollectionView scrolls to the second-to-last item instead of the last item. However, if the user scrolls to a certain position and then adding items, the CollectionView correctly scrolls to the last item.

Screen.Recording.2025-04-25.194804.mp4

Steps to Reproduce

1. Run the attached sample ItemsUpdatingScrollModeIssue 2.zip
2. Add items from the top and observe that KeepLastItemInView Does Not Scroll to Last Item instead it scrolls to the last before item.

Expected Behavior:

• The CollectionView should consistently scroll to the last item, regardless of the current scroll position, after adding new items at the top.

Actual Behavior:

• If the visible content is at the topmost position, the CollectionView scrolls to the second-to-last item instead of the last item.

• If the user scrolls to a certain position and then adding items, the CollectionView correctly scrolls to the last item.

Link to public reproduction project repository

No response

Version with bug

9.0.60 SR6

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[similar-issues-ai]

We've found some similar issues:

• [Android] KeepItemsInView and KeepScrollOffset doesn't not works as expected when new items are added in CollectionView #29131 , similarity score: 82%
• CollectionView Fails to Preserve Scroll Offset with GridItemsLayout Using KeepScrollOffset #29202 , similarity score: 82%
• [iOS] KeepItemsInView Does Not Show Newly Added Items After Scrolling Down in CollectionView #29145 , similarity score: 82%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

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This issue has been verified in Visual Studio (17.14.0 Preview 4.0) with MAUI versions(9.0.60, 9.0.0, 8.0.100). It can be reproduced on the Windows platform.