Rollovers must have caps. The switches are usually hit by a fast moving ball. Early 80’s Bally all had caps on every rollover.

Check your switch gaps.

Adjust them with a ball. Make sure the ball hits the switch and closes it towards the middle of the stroke(watch the wire) If it closes the switch too early you’ll get phantom closures.

There’s no perfect gap in inches. The switch wires get deformed. Use the ball and your eyes.