DJM450 - BUG bluethoot iMAC

Goodmornig,

I think I have to deal with an additional BUG regarding the drivers of these mixers.

I have an iMac 2017 Retina 4k macOS Catalina 10.15.7 and what happens is something absurd!
I'll explain what happens,.. if I turn off the mixer or unplug the USB cable,    the MAC 's bluethoot stops working !!! consequently the mouse and keyboard are not usable and I have to turn off the MAC from the power button risking damage.
Crazy!!!

I tried the following 2 drivers DJM-450_M_2.1.2.dmg and DJM-450_M_2.2.0N

Maybe it's time for an update?

Thank you