While running the programs on our cars，certain motors ( always some concerned with claws or the motors connected to long wires) always stop suddenly and the red lights on motors start flickering.
We've found that if we connect them to other ports，stopped motors work normally again. But the ports these motors previously connected to break completely, and the new ports we use will also break after some time.
All of our V5 brains have such issue, and it seems to happen quite easily.
We've also checked our programs and our structures to avoid the motors from overload.
How to solve the problem?