yt android has been buggy as fuck for me. randomly disconnecting while casting, captions stopping halfway thru a video and the button for them greyed out until i disconnect and restart the app, no tab buttons at the bottom when i first open and it goes straight into shorts instead of homepage until i back out then restart the app, sometimes when trying to watch a video on the app and not casting it just straight up refuses to play not even showing a buffering symbol just the play button like a static image. it's gotten ridiculously bad.
I just noticed this an hour ago also. I can still access it via the landscape mode button but not normally. I thought it was maybe a bug I had to restart YT to fix but perhaps not since you have it too.