[BUG] MediaElement throw ObjectDisposedException when wrapped in CollectionView

[WolfgangPhy]

Is there an existing issue for this?

• I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

• I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

The MAUIELEMENT.Handler?.DisconnectHandler() throws an ObjectDisposedException when the MediaElement is wrapped in a ContentView inside a CollectionView.

This issue occurs only when the MediaElement is wrapped in a ContentView (e.g., the VideoPlayer in the reproduction repository). If the MediaElement itself is used as the ItemTemplate, the DisconnectHandler() works as expected.

Expected Behavior

The DisconnectHandler() not throw an exception.

Steps To Reproduce

1. Open the app in the reproduction project
2. Click on the CollectionView button
3. Click on the go back arrow in the NavigationBar

Link to public reproduction project repository

https://github.com/WolfgangPhy/MediaElementInCollectionViewBug.git

Environment

- .NET MAUI CommunityToolkit: 9.1.1
- OS: Android (not tested on iOS yet)
- .NET MAUI: 8

Anything else?

I investigated the issue as thoroughly as I could to identify the root cause. By debugging the MediaElement source code, I found that the exception originates here: [SOURCE] (

Maui/src/CommunityToolkit.Maui.MediaElement/Views/MauiMediaElement.android.cs

Line 94 in 9741f1a

playerView.Dispose();

).

(My issue might be related to the ExoPlayer issue mentioned in the comments a few lines above.)

You can see a screenshot of the exception here: Source of the exception

Given that the error only occurs when the MediaElement is wrapped, I strongly suspect that CollectionView recycling is the cause of this issue.