That's an interesting problem !
Both the flippers and the bumpers create vibration. Sounds like a switch is out of adjustment and the vibration is enough to trigger the reset. Considering they are in close proximity to each other - I wonder if you "tap" the general area with your fist it would recreate the problem. I don't have schematics - so if I was standing in front of the game right now - I'd be trying that !
