Repeatedly unable to login to Mac Mini although i know my password is correct

Hi Guys,

This is a slightly strange one. I keep having an issue where i come to login to my Mac Mini computer on a morning and it will NOT take my password. I have to go through the resetting the password in the filevault option. It then starts working for a couple of days before going through the same issue..

Its almost at the point where i thinking the keyboard might be faulty or waking up in a strange state. Unfortuately i cannot 'reveal' the password when typing so i cannot see what characters are being types but it's a simple password without any extended characters etc..

ALSO. I have just experienced the same issue with my Mac Pro! The only point of commonality is that they both using GMMK Pro keyboards which are USB-C connectivity. I dont know whether anything like this has been reported elsewhere. I am going to have to try swapping out the keyboards for vanilla ones and see whether that changes anything...