[MAUI]I5_EmptyView - When input some string in the filtering bar and click the "search" during project debugging, app will hang

[Ying-6]

Description

1. This issue will be reproduced when directly click 'EmptyView String' for 'Filtering' to test. However, this issue will not be reproduced when you test the 'EmptyView String' for 'ItemsSource Null' and 'EmptyView String' for 'Load simulation' two pages first and then test the EmptyView String for Filtering page.
2. This issue will only be repro when the project is debugging. It will not be repro when manually start the app test after stopping debugging.

Affected case:
Test Case 2079810: I5 - EmptyView String for Filtering.
Test Case 2079812: I5 - EmptyView with multiple views for Filtering.
Test Case 2079819: I5 - EmptyView with EmptyViewTemplate for Filtering.
Test Case 2079820: I5 - EmptyView with EmptyViewTemplate for Data template selector.
Test Case 2079824: I5 - EmptyView swap for Filtering.

Steps to Reproduce

1. Deploy https://devdiv.visualstudio.com/Pkgs/_git/VS.TestAssets.Xaml?path=/Assets/Projects/ManualMauiTests to iOS
2. Click or tap on category 'I' for 'CollectionView' -> I5 EmptyView page-> EmptyView String' for 'Filtering'
3. Input some string, then hit Search or the Enter key on the PC keyboard

Actual Behavior:
App will hang.

Expected result:
App works fine an the string 'No items match your filter.' will be displayed.

Link to public reproduction project repository

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

Version with bug

9.0.40-ci.main.25062.1

Is this a regression from previous behavior?

Yes, this works fine in 8.0.3. It can also be reproduced on 9.0.40-ci.main.25072.1 & 9.0.30 & 9.0.0 & 9.0.0-preview.1.9973 & 8.0.100.

Affected platforms

iOS

[similar-issues-ai]

We've found some similar issues:

• [MAUI]I5-EmptyView- filter not responding. #23301 , similarity score: 86%
• [MAUI] I5_ EmptyView - No string is shown in the three 'EmptyView String' pages #26663 , similarity score: 81%

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.

[Ying-6]

This issue does also repro with the CollectionView2 handlers.

[jsuarezruiz]

Take a look at #26838 (comment)

[Ying-6]

This issue does also repro on 9.0.40-ci.main.25072.1 & 9.0.30 & 9.0.0 & 9.0.0-preview.1.9973 & 8.0.100, but 8.0.3 works fine.

[jsuarezruiz]

I have created a branch https://github.com/dotnet/maui/tree/fix-26838 where I have added the sample to reproduce the issue. Debugging in the main branch, using iOS 18.2, I cannot reproduce it.

Need more investigation.

[Ying-6]

Hi @jsuarezruiz I can repro this issue use the branch that you created.

Could you try the following steps to see if you can reproduce the problem:

1. Uninstall the deployed project app from the iOS simulator.
2. Clean Solution and debug again to iOS Simulator.
3. Keep VSCode in debugging mode, then click "Go to Test Cases" in the app
4. Search for issue ID "27138", click directly to enter this page, and then repro this issue.

The key to this bug is that the project needs to be kept in debugging state, and in a relatively clean environment. After debugging the project, we can reproduce this issue by directly verifying this page.