Does anybody know why the full screen button stops working?

I keep getting this problem where I can't go into full screen in the YouTube app. Basically I can't rotate my phone, and clicking on the button does nothing. I've tried force stopping the app, clearing the cache, making sure my phone isn't locked in portrait mode (never is), uninstalling and reinstalling updates (phone does not give the option to unistall YouTube), and at some point even toggling my app settings to always be in zoom mode. The only thing that makes the bug go away is completely restarting my phone. The problem is it completely interrupts what I'm doing, and it always comes back eventually. I tried reporting the problem, but YouTube gave me nothing back.

So I've come here to see if anybody else had this problem and what they did about it. Restarting my phone every single time has gotten annoying super fast, so any new advice would be helpful.