Could you please read this forum post and bug report to see if that issue appears to be the same one that you are seeing?
Could you also please confirm:
- Your 8BitDo Micro controllers were connected via Bluetooth, not plugged into USB-C using a cable?
- When you tested Safe Mode, all add-ons (including Contanki) were disabled? And, the problem still occurred?
Please also provide details about your computer: things like MacBook model, OS version, Anki version, etc.