Lately my Black Knight will occasionally fail to kick out the last ball during multiball. Even when I start with a 3-ball multiball and two of the balls drain, it still displays that there are 3 balls in play. Pushing the ball up for a moment and then allowing to roll back on the switch seems to reset it. I am thinking it is something other than the lowermost switch on the trough because even if that wasn’t,t closing properly it wouldn’t explain why the display shows three balls in play after two have drained. I am thinking this is some sort of a communication issue possibly on the interconnect. I appreciate any ideas you may have on what might be causing this. Thanks!