Customer claims car just quits answering hall calls says it happens at all floors. This last time she claims that she hit the hall button and it latched but the car did not respond. Again no faults we had a tech there with in 10 min and everything was working no faults logged. We tried to recreate the problem and everything we did seemed to log a fault. However I discovered the car isn’t going into nudging which got me thinking maybe the residents are holding the doors. The other thing I was thinking is there is supposed to be a fix for the Lon in the hall stations adding a ground and a resistor trying to get some more info on that as well.