I had an issue where during house multiball, stacked with Escape the Kitchen, a ball got wedged between the diverter and metal flap on the backboard. I eventually knocked it loose with the other ball but once I drained down to one ball, for the rest of the game the diverter would not direct a center ramp shot to the left. It always went right into the house but the flipper power was cut so it would just drain down into the sanitarium playfield.
I thought the diverter might toast but once the end of game cycle happened, the diverter went back to its original position.
I also noticed during the multiball chaos that the playfield LED strips were not blue like they usually are for Escape the Kitchen.
Would a copy of the log files help diagnose that?