Edit: Nevermind, seems it has been fixed in 2020.3.2!
Seems that the last update broke the keyboard shortcut F12. I use it for jumping between code and console (by cycling between Esc and F12). Suddenly it stopped doing anything, it doesn't respond at all.
I checked the keymap and it's still bound correctly to "Jump to Last Tool Window". Tried restarting, running as admin, rebinding F12... not sure what else can be done.