1. Create a platform media source.
2. Assign a media file to the windows platform.
3. Create a media player.
4. Try to play the platform media source created earlier.
Result: The media source fails to play and shows a toast and prints to the log.
Expected Result: The media source plays properly.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-40709 in the post.