Bug on Apple TV with UHD Amazon Prime Video
UHD contents are playing fine on netflix, but the videos from Amazon Prime Video are black (sound is playing but no picture) if they are UHD on the last Apple TV 4K.
The only solution I found was to disable UHD in the global settings of the Apple TV to put it back to SD (but then I have to switch it on again for other apps).
So there is a bug with either Apple TV or with the Prime Video app that should be fixed.
Everybody is having the same issue but just gave up. Please help.
A good example is the serie "Totem" available on prime video from Amazon : impossible to play on Apple TV 4K if you don't deactivate UHD in the global Apple TV settings
Apple TV 4K, tvOS 15