Windows Key on my windows keyboard which was originally mapped to Command by default is no longer working.

Nice.. issues like this were the reason why I switched to Apple. Now it seems like Apple produces equal level of buggy software.

Exactly the same. External USB Keyboard: Left Windows Key was mapped to Cmd (worked perfectly in 11.5) and now it doesn't.

• It is NOT a hardware defect, because it is also not working in Recovery Mode (when booting up the Mac while pressing Cmd+R)
• I have no 2nd keyboard to verify if this might be some weird manufacturer key code, I'll post an update if I tried