Can't open any editor window in 2021.3.39 / 40

Hey guys bit of a weird one.

Upgrading to either unity 2021.3.39f1 / .40f1 but on both versions we’re encountering a weird problem.

No windows will open inside the editor (eg build settings / package manager / custom tool windows) if I select them from the top bar. But they do open if I press the hot key (eg build settings ctr+shift+b). Kinda stumped and things open fine on 2021.3.28f1 and also things are fine on a new project inside .39/.40.

Wondering if anyone has suggestions? I’ve tried resetting the layout as mentioned in some other posts but still no luck & theres no errors in the console that lead me to anything