There certainly could be some software improvements to the driver, perhaps a bug with those for the M1 Macs. However, USB 3.0 still can be a problem with BT.It was reported that these will be fixed in an upcoming update. I have a MacBook Pro that’s intel so I may take the plunge on M1.
When I added an SSD, my HDD/SSD upgrade kit included the following, which I was surprised because I don’t recall having issues — though I then remembered I only used FW and USB 2.0 peripherals until recently.
OWC Bluetooth Module Shielding Kit for Mac mini 2012
The 2012 Mac mini is great, but some units don't have proper shielding on the Bluetooth module, and can experience interference from USB 3.0 drives.
