Can't switch tabs in play mode on Ubuntu

Hi all, I’m using Unity 2021.2.0b16.3733 on Ubuntu 20.04. When in the editor in play mode, clicking on tabs at the top of the view window doesn’t actually change tabs, but just causes the view to go back and forth between using the whole window, see the attached screenshots. Has anyone else had this issue/know how to fix it?

First thing to try: update to 2021.2f1, it was released yesterday. If the problem persists, submit a bug report as soon as possible.
You can try to turn off the maximize game window in the menu behind the “Play Focused” button in the header of the game window.

Confirmed this still happens on 2021.2f1. Have already filed a bug report. Setting play focused or play maximized or play unfocused all produced the same result.