CollectionView snaps randomly when we give horizontal and vertical spacing

[AswinPG]

Description

When using CollectionView with GridLayout and use Vertical and Horizontal spacing with span 2, the collectionview snaps while scrolling. It makes scrolling feel jerky and makes a feeling that the scroll has ended, when in fact there's more to scroll

Steps to Reproduce

1. Create a CV
2. Use GridLayout with span 2 and vertical orientation
3. Give HorizontalItemSpacing and VerticalItemSpacing
   4.Run app and scroll the CV

Link to public reproduction project repository

https://github.com/AswinPG/CVSnapRepro

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Android, I was not able test on other platforms

Affected platform versions

No response

Did you find any workaround?

Don't use ItemSpacings

Relevant log output

No response

[ghost]

Hi @AswinPG. We have added the "s/needs-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/dotnet/maui/blob/main/.github/repro.md

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[AswinPG]

https://github.com/AswinPG/CVSnapRepro

[ghost]

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[xavic99]

It happens the same using VerticalLayout and specifying a ItemSpacing

<CollectionView.ItemsLayout>

</CollectionView.ItemsLayout>

[Take-A-Byte]

Seems to be related - #19383 (comment)

There seems to be a race condition in a render/calculate call when we have a relative size in the grid or spacing.

[JoeVoo]

I see this on Windows, only on my main screen (3440x1440) but not on the smaller second screen: (1920x1200).
Downsize the main screen does not solve it.
Changing the window size let the number of columns snapping between 2 and 1 or between 3 and 2, depending on set gridspan to 2 or 3.
The collectionview keeps the full number of columns, but the last column will be empty and the items jump to the previous column.
Tested on net9 with all updates and with c# markup page.

[JoeVoo]

I found out that there is a connection between 'Snapping' and the graphic hardware.
On the faster Geforce 2060 of the main screen, it snaps, on the slower Isis Xe it does not snap.
seems to relate to #19383