Running the latest Plex Apple TV app.
If I go to Playback settings and select Audio Track 2 for a movie, watch it and go back to the menu again, the selection is checked on track 1. The system has selected track 2 though, it’s just no visible in the UI. So to select track 1, I need to toggle Track 2 and then back to Track 1.
Pretty subtle but was causing problems for me as I was fixing some audio issues I had