Hope I didn’t post this already, but it’s still a pain after 1 year.
The left side bar is out by default for certain aspect ratios, but the arrow is facing the wrong way. Clicking the arrow does nothing. The side bar covers content, so you can’t even read the article.
The only way I have fixed this is by resizing the window, but it’s annoying cause it happens on every page of the docs, so I have to resize my window up then back down for every new page I visit.