[Media Player Example] App hangs when previous track is clicked

Media player example hangs when previous track button is clicked on MacOS

Steps to reproduce:

1. Run the Media player example
2. Select file and open a video file to play
3. Click on the shuffle button
4. Click on the previous track button

Actual Result:

The app hangs and stops responding 

Expected Result:

The video is played from the start or if there are other videos in the queue then the previous video is played.

Reproducibility: 100%{}

Note:

There are approximately 300 warnings in this example.