This setup is still very new but so for I have had 10 great prints but 4 random mid print failures. The Halts seem to always happen around layer 4-8 and the board gives no reason for the HALT. Marlin would tell me "thermal runaway" or "heating failed" but smoothie ware just gives me the option to clear the HALT. Is there a way to enable verbose logging to the SD card for diagnostics?
I am printing diretly from the SD card, the USB and Ethernet ports are not connected so "ground loop" is not likely a culprit.