I am getting a severe rash of these now on every cutting job that has some time in it. Very frustrating to restart multiple times! I have to think my GRBL board has become defective in someway. Last job I did with VERY easycut depths and speeds. Should have been minimal effort on the router. Dewalt router set down to 4.5 speed.
I was milling Maple taking 0.05 depth cuts at 40 in/min, 15 down.