Hey,
I’m experiencing this issue with all of my devices, but on Apple TV it is a deal-breaker. When going to the details page of a movie / episode and pressing the arrow down toggle to check the versions, selecting any of the versions won’t start the playback. On iOS, pressing and holding on a title within a list will open a pop-up which lets you choose the version - this way, the chosen version will play - but the option is missing on Apple TV.
Version 8.5.5