My son turned on a few different movies tonight since updating the app to the latest beta and there’s an issue with the underscan. Instead of black bars on the sides or top/bottom (depending on aspect ratio) you now see the movie background image instead of black space.
Same issue for me. The background pic is showing through the black area on the movies. Wife yelled at me to fix Moana so I ran into the room and saw that and was like… I can’t fix that. lol