M4 Stepper motor troubleshooting

I have yet to make my first cut i have had issues with one stepper motor not engaging at times and then it would i switched the motor to the other port and it functioned properly ruling out the motor malfunctioning so i am lead to think its the pcb or the port has anyone faced this issue maybe its firmware i just updated it to v80 but i am lost to what the real issue is

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It sounds reasonable that it is a PCB issue, I’ll DM you a code to order a free replacement right now! Sorry for the trouble!