[MAUI]After sliding horizontally, the page cannot display the latest added item.

[RoiChen001]

Description

After sliding horizontally, the page cannot display the latest added item.

Affected test case：
I1_Add items to linear layout

Steps to Reproduce

1.Deploy https://devdiv.visualstudio.com/Pkgs/_git/VS.TestAssets.Xaml?path=/Assets/Projects/ManualMauiTests to Android platform.
2.Navigate to I1_Add items to linear layout.
3.Click button 'Add' to add more items.

Actual result:
On the Android platform, after horizontal sliding, the page does not display the latest added item7.

On the iOS platform, the page also cannot display the latest added items.

Expected result:
After sliding horizontally, the page should display the latest added item.

Link to public reproduction project repository

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

Version with bug

9.0.30-ci.main.25052.1

Is this a regression from previous behavior?

Not a regression. It can also be reproduced on 9.0.21 and 8.0.3.

Affected platforms

Android, iOS

[mattleibow]

Does this happen with Windows?

[RoiChen001]

@mattleibow In fact, we can also say that it reproduces in Windows and MacCatalyst, but if we drag horizontally to enlarge the window, we can see the hidden item. BTW, it's still reproducible on CollectionView2 handlers.

[jfversluis]

@RoiChen001 I think this simply happens because the button and the CollectionView are in the same cell in the Grid. We probably need to change the app to not do that. So this is not so much an issue with one of our controls, it seems to be a bug in the testing app :)

Is this something that you can fix or should we?

[RoiChen001]

@jfversluis Thanks for your attention, we will fix it and update our results promptly.

[SailDev]

I am observing the same behaviour with Maui 9.0.21 on iOS.

It's hard to detect:

• Simulator Iphone 16 - works o.k.
• Simulator Iphone SE (3. gen) - works o.k.
• IPad with different window width's - works o.k.
• Physical Iphone 12 - last 2 entries are cut off.

Two workarounds work for me

1. Use ItemSizingStrategy = MeasureFirstItem. I know, it's not the solution for every scenario, but on the other hand it's a performance boost.
   or
2. Do not use "HorizontalItemSpacing", use item margins instead.