[9.0.50] CollectionView display is broken when setting IsVisible after items are added

[tranb3r]

Description

This is a regression introduced in 9.0.50.
In my app, some CollectionView are not displayed properly, if IsVisible is set a few seconds after adding items to the CollectionView.

Steps to Reproduce

Run repro project on android.
At first, there is only a blank screen, because the CollectionView is hidden (IsVisible=False). This is the expected behavior.
Wait 10s after opening the app, the CollectionView appears, but most items are empty. This is the issue.
Scroll the CollectionView a bit, some items will appear.

Link to public reproduction project repository

MauiAppCollectionViewIsVisibleRegression

Version with bug

9.0.50 SR5

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

9.0.40 SR4

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[similar-issues-ai]

We've found some similar issues:

• [iOS/Mac] CollectionView is not shown when parent IsVisible is switched to true #23573 , similarity score: 82%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

Note: You can give me feedback by 👍 or 👎 this comment.

[kubaflo]

Is your case similar to this one:
https://github.com/kubaflo/maui/blob/2a6cc6407b86bb5bc9e5ed7e30ec7c709137aa79/src/Controls/tests/TestCases.HostApp/Issues/Issue28162.xaml.cs

[tranb3r]

Is your case similar to this one: https://github.com/kubaflo/maui/blob/2a6cc6407b86bb5bc9e5ed7e30ec7c709137aa79/src/Controls/tests/TestCases.HostApp/Issues/Issue28162.xaml.cs

It's similar but not the same.
I've just added a repro.

[kubaflo]

@tranb3r will it work if you remove, a ContentView inside <DataTemplate>?

[tranb3r]

@tranb3r will it work if you remove, a ContentView inside <DataTemplate>?

@kubaflo Yes, it works if I remove the ContentView insed DataTemplate.
However, this is just a repro project. My app is more complex. I cannot get rid of the ContentView easily.
Also, why does a simple ContentView cause suddenly so much trouble?

[kubaflo]

@tranb3r will it work if you remove, a ContentView inside <DataTemplate>?

@kubaflo Yes, it works if I remove the ContentView insed DataTemplate. However, this is just a repro project. My app is more complex. I cannot get rid of the ContentView easily. Also, why does a simple ContentView cause suddenly so much trouble?

#28425