I have noticed a unique bug on the AppleTV for a while.
When and only when the Picture in Picture window is open:
- Select a new episode or recording that has other episodes
- A different episode besides the one you selected will start playing
I think I recall seeing this bug in the normal recording window a while back but it was fixed.
However, it still remains for me only when the Picture in Picture window is open. Any other time behavior is as expected.