@k3A7lQ Did you perhaps find a solutions to the problem? I am seeing the exact same behaviour on my SKR2 and 2209TMC drivers on the extruder. I bought the TMC2209 directly from BigTreeTech. Currently running the latest version of marlin. 2.1.0. I had already got 1 burned out E0 stepper because of this. What I noticed is that mid print the micro steps would drop from 16 to 8 mid print and then suddenly the stepper driver would become very warm, much warmer than normal and the print would start using too much filament. The M122 report returns: Testing E connection... Error: All LOW. After turning off the printer and back on the error would go away and the microsteps would be back at 16.
@BTT Tony any ideas on your end what might cause this?
