Super key not working in Ubuntu 20.04

Just in case anyone else is in the same situation as me and stumbles across this ...

check that your keyboard doesn't have a function button to lock the windows/super key. Mine did on f12 and I accidentally pressed it without knowing what it was. Just pressing it one more time fixed the issue ...

I have the same issue but only when I select languages: Spanish, Italian, Russian. On English and French it works perfectly (which are in 1st and 4th position). As a workaround I put the two languages I use the most in 1st and 4th position, and for the rest I use ALT + F1 , that works in the same way... Hope the information helps.