[BUG] MediaElement on iOS: `[AVAssetTrack loadValuesAsynchronouslyForKeys:completionHandler:] invoked with unrecognized keys`

[TheCodeTraveler]

Is there an existing issue for this?

• [X] I have searched the existing issues

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

• [X] 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

When running MediaElement on iOS, the console output reports the following error:

2024-09-21 14:39:41.118981-0700 CommunityToolkit.Maui.Sample[72993:5603957] -[AVAssetTrack loadValuesAsynchronouslyForKeys:completionHandler:] invoked with unrecognized keys (
    "currentVideoTrack.preferredTransform"
)

Expected Behavior

We should not be unintentionally inducing errors

Steps To Reproduce

1. In Visual Studio, build + deploy CommunityToolkit.Maui.Sample to an iOS Simulator
2. In the iOS Simulator, navigate to Views -> MediaElement
3. In the Console Output window, confirm the following error:

[AVAssetTrack loadValuesAsynchronouslyForKeys:completionHandler:] invoked with unrecognized keys (
    "currentVideoTrack.preferredTransform"
)

Link to public reproduction project repository

https://github.com/CommunityToolkit/Maui

Environment

- .NET MAUI CommunityToolkit: v9.0.3
- OS: iOS 17.5
- .NET MAUI: 8.0.72

Anything else?

No response

[andrehuhn-be]

I have exactly the same issue with following environment:

**- CommunityToolkit.Maui.MediaElement v4.0.1

• CommunityToolkit.Maui: v9.0.2
• OS: iOS 18.0.1
• .NET MAUI: 8.0.71**

[xiufengpeng]

I have the same error/exception with all latest updates as of today (20 Feb 2025). It's weird that it only happens on iPhone, not on iPad.

• .Net 9.0
• CommunityToolkit.Maui :11.1.0
• Maui.MediaElement: 6.0.1