I'm having an intermittent problem with my Mata Hari. Sometimes the ball will land in the saucer hole at the top and it just stops. The coil doesn't fire and the ball just sits there. If I open the glass and press down on the ball, the ball will kick out like it's supposed to. I tried adjusting the leaf switch but I'm still having the issue. It seems that when the switch is too close, the saucer will fire from vibrations at the top of the playfield. I've even seen the game reset a couple times when the ball gets stuck there although this is pretty rare. (I think it's happened twice). Is this just a matter of getting the switch adjusted properly or is there something else I should be looking at? Thank you.