1.20.1.3252-a78fef9a9 (Windows PC)
8.6.0.20351 (FireTV)
This problem is easily reproducible.
Regarding the new TV show UI (definitely better!), when I select a recently added TV show from Home, and it shows all the episodes in the row, none are actually selected by default. The episode I selected is showing on the screen, but not selected by default and its image is not enlarged.
When I press OK, nothing happens (since there is no default selection).
When I press Left, then Play gets highlighted, and pressing Left again, I get to the left pane navigation. Funny enough, instead of Left, if I press Up, Play also gets highlighted.
Instead of pressing Left or Up, if I press Down, then nothing is still highlighted but the left pane appears (with nothing highlighted). Also, Back multiples times no longer allows me to exit Plex.