I just upgraded my V-Core3 500 to RatOS 2.0 and on couple of occasions I run into the following error when I try homing the printer (G28):
Must home axis first: -0.025 375.000 15.027 [0.000]
Must home axis first: -0.025 375.000 15.027 [0.000]
behavior is printer begins homing (lowering Z, does first endstop bump, then error appears (printhead does not move to the middle as expected). Firmware reset seems to resolve the situation.