I found a strange problem yesterday while trying to see Spider-Man: Into the Spider-Vers.
This movie supports 4K, Dolby Vision and Dolby Atmos. When I tried to play the movie from the "Apple TV" app, it played in HD and without Dolby Vision and Dolby Atmos. But when I played the movie from the app "movies iTunes", it played in 4K and with Dolby Vision and Dolby Atmos.
Has anyone experienced similar issues with the Apple TV app?