Problem when entering fullscreen mode on YouTube

I've also been seeing this for a while in Youtube however today was the first time I experienced it on a different site - this time it was when trying to see a Facebook photo in fullscreen.

I've sent feedback with diagnostics on that.

I would also add that the issue with Youtube doesn't happen every time, I don't think it fixes itself by restarting the browser but I think it doesn't happen immediately after a fresh restart of the computer (haven't really tested to be honest, it's just my gut feel)

Edit: it seems at least with Facebook the issue is resolved by closing and reopening the browser and then navigating to the page again (I just copy & pasted the address, didn't try reopening the tab)