RefreshView makes CollectionView use all available vertical space despite VerticalOptions=Center on CollectionView

[janseris]

Description

When CollectionView has VerticalOptions=Center set, it takes up vertical space as a sum of height of all its items + margin etc.
When placed in a RefreshView, it takes the whole available space unexpectedly.

Note:

• when setting VerticalOptions=Center on RefreshView, the CollectionView does not show at all
• workarounds such as wrapping CollectionView in <Grid> or <ContentView> did not help

Steps to Reproduce

1. Run app

To observe correct behavior, remove the RefreshView.

Link to public reproduction project repository

https://github.com/janseris/MauiRefreshViewStretchesCollectionViewVerticallyBug
Note: there is Task.Delay(4000) in UserService which mocks loading the data. Because of that, loading will take 4 seconds.

Version with bug

7.0 (current)

Last version that worked well

7.0 (current)

Affected platforms

Android, I was not able test on other platforms

Affected platform versions

Android 12 (but probably all)

Did you find any workaround?

No response

Relevant log output

No response

[jsuarezruiz]

We need to validate and confirm, but could be fixed by #14302
cc @rmarinho

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.

[rmarinho]

This is not fixed by my #14302 as this issue is on Android.

I checked and I can repro on main and also on iOS

[XamlTest]

Verified this on Visual Studio Enterprise 17.7.0 Preview 2.0. Repro on Android 13.0-API33 with below Project:
14479.zip

For iOS, it shows different behavior: