Major bug plugging in USB devices on the computer

- Scenario: 

Macbook Air M1 with MacOS Bir Sur. Tried also in Macbook Air i5 with Catalina and iMac i5 with Catalina.

Rekordbox 6.5.3 Free plan with DDJ-400 plugged in

Broadcasting software (OBS)

- Error:

When you plug in a standard USB microphone for use with other software, DDJ-400 stops working and Rekordbox and even disconecting it doesn't fix: you must restart RB with anything unplugged to work again. And if you plug again a mic it will break again!

Please, this is crazy.