No video control bar

I found out that on a 21:9 Monitor on fullscreen the bar with pause volume and time selection doesn’t show up, on my second monitor with 16:9 or in window it works just fine, this occured first a few days ago. Here a screenshot: https://imgur.com/a/1iMzKR0
Hope that description helps.

Thanks a lot for your feedback! Did you somehow hide the chat on the right or is this just the crop of the screenshot?