[MAUI]I9_ Scrolling- Try scrolling down and when new items are added the first item does not kept in the displayed list.

[Zhanglirong-Winnie]

Description

[MAUI]I9_ Scrolling- Try scrolling down and when new items are added the first item does not kept in the displayed list.
Affected case:
I9 -Control scroll position when new items are added.

Steps to Reproduce

1. Deploy https://devdiv.visualstudio.com/Pkgs/_git/VS.TestAssets.Xaml?path=/Assets/Projects/ManualMauiTests to Android /iOS/MacCatalyst platforms.
2. Navigate to 'I_CollectionView' ->I9_ Scrolling' ->"Scroll mode when adding items"
3. Updating Scroll Mode to KeepItemslnView
4. Try scrolling down

Actual Behavior:
Try scrolling down, when adding new items, android, iOS and MacCatalyst the first item does not kept in the displayed list.

Expected Behavior:
The first item is always kept in the list displayed when a new item is added.

Link to public reproduction project repository

https://devdiv.visualstudio.com/Pkgs/_git/VS.TestAssets.Xaml?path=/Assets/Projects/ManualMauiTests

Version with bug

Microsoft.Maui.Controls 9.0.30-ci.main.24624.2

Is this a regression from previous behavior?

Not a regression, The issue also repro on 9.0.21 & 9.0.0 & 8.0.100 & 8.0.3

Affected platforms

iOS, Android, macOS

[similar-issues-ai]

We've found some similar issues:

• [MAUI] Unable to scroll up and down #23309 , similarity score: 81%

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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