Navigation back arrow missing in full screen

I have some TV shows downloaded onto my computer. I usually have appleTV in full screen as 'space/desktop' (or whatever you call it). When I click on a serier icon to see the list of episodes the navigatino arrow to go back to list or all shows dissappears of screen so I have to exit full screen and go back, then re-full screen (ok, the going back to full screen is a choice). Am I the only one? Is this a UX issue - if so how do I flag it?

NB: Using the Apple TV app (1.4.5.36) on 14.5 (23F79) - but it has been present for a while.