Balls-a-Popping help needed.
I would appreciate any help or suggestions that anyone has. I'm working on a 1956 Bally Balls-a-Poppin
The game does not advance the player stepper unit when the ball drains. The player stepper and ball counter are a single spider.

Instead it immediately kicks the ball back into the shooter lane. No "end-of-ball" sequence appears to operate (I would assume the wild ball count is reset and other things happen) but nothing happens when the ball drains except it gets kicked back into the shooter later.

When the start button is pressed, the game resets, including the player stepper unit, but the player/ball stepper unit never advances during game play

Checked all switches and coils and still stumped...