I am getting GRBL error 21 "More than one g-code command from same modal group found in block. " from time to time.
I am connected to the MKS DLC32 board via WLAN (same error via USB).
What I have tried so far with no luck:
Using synchronous or buffered connection
Using constant power mode or dynamic power mode
MKS DLC32 firmware version is V2.30_H35_2022_1223_N_ZX_001.bin
With buffered connection I get an instant error and with synchronous after a while (when the malicous G-code block arrives at the controller I assume).