@jasiubloniar Me too! This started to occur recently for me

@leocg Yeah, I think that is it. The configuration is to don't show the side bar, and show only when I hover the mouse upon the left side. Despite this is working fine, when I exit the Fullscreen mode on a YouTube video, that space reserved to the side bar tools turns a black rectangle (even when I don't hover upon it).

@leocg It is the black bar on the left side of the screen:

Hello.

Whenever I exit the youtube fullscreen mode, a black side bar appears on the left side of the screen. Here is a printscreen of the problem:

It is so annoying! Can anyone fix this bug?

Thanks in advance!