Yeah, that one, too. I had to change the number of linear axes.
Again, my problems weren’t related to G0 moves, though.
So then, AFAIK, grbl will send G0 moves at the max feedrate. In the sender console, type $$ and verify the max feedrates there. The order should be X, Y, Z, X2, Y2. X should=x2, y should=y2. May as well check the accelerations while you’re in there. For reference, mine were set to 5000mm/min, about 250 for acceleration.
If that isn’t it, go ahead and open the config and start looking for things that don’t make sense.