This is actually not a problem, I think, the top "1" lane switch on my embryon was really unreliable. Sometimes it would make, most times not, and when it did work, it usually was when the ball rolled up the lane via a bumper hit etc.
I adjusted the switch and can't recall if I replaced the capacitor but with no real benefit. The other day I decided to cut one side of the cap from the switch and it works 100% better and registers every time even when activated quickly. I thought the cap was used to keep the switch energized so the slow cpu could keep up with tracking what was activated etc could someone enlighten me on whats going on and whether I should replace the cap or leave it