Only one car does it?
If so, quite possible the call is being cancelled due to the car being “at floor”, but the (MAC 104) door open pilot relay(s) is bad, or the opening slow speed doesn’t have the poop to open the door. If the NUD relay appears unmolested, You can swap the DO pilot with NUD on the door board and see if your issue continues (if you have enough new relays, replace them).Tight belt or bad belt(s) will give door troubles too. Also check the operator sheaves for proper alignment one to another. I’ve seen the set screws loosen and sheaves walk out or in causing door troubles.