CollectionView with vertical GridItemsLayout uses incorrect Span on Windows

[chsoft-rbi]

Description

In a CollectionView with a GridItemsLayout with Orientation vertical, the number of columns shown is one lower than Span on Windows, it's correct on Android.

Steps to Reproduce

1. Open the Part 6 solution of the .NET MAUI Workshop project from https://github.com/dotnet-presentations/dotnet-maui-workshop
2. In MainPage.xaml comment out the CollectionView.Items:Layout block from Line 35 to 37 and change the orientation to Vertical
3. Run the project on Windows
4. Click the "Get Monkeys" button
5. There are only 2 columns instead of 3. If you run it on android, there are 3 columns as expected.

Link to public reproduction project repository

https://github.com/dotnet-presentations/dotnet-maui-workshop

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

Windows 10 SDK 10.0.19041

Did you find any workaround?

No response

Relevant log output

No response

[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.

[Zhanglirong-Winnie]

Verified this issue with Visual Studio Enterprise 17.7.0 Preview 1.0. Can repro on windows platform with sample project.
dotnet-maui.zip

[Moonenm]

Got the same issue. GridItemsLayout is always showing one less column than span. See image above. On Android it is working correctly. Only on Windows.

[MitchBomcanhao]

same issue here

[MitchBomcanhao]

still no movement? this is quite a bad issue - how can this be ignored for so long

[nagendrababu432]

We are also experiencing the same issue. Can someone from maui team provide an ETA when this will be resolved.

[MitchBomcanhao]

bump