Quoted from hiho:Problem solved -> the old switch was stiff as fuck... after 50 plays replaced with an old fashioned b/w rollover, all good. no more premature end of ball.
Yep. I've had this type of stock switch fail very quickly on two different NiB games, TNA (trough switches) and this one IMDN. The nub seems to get very stiff and won't actuate properly anymore.
I don't know why they can't just use classic microswitches that have worked reliably for decades.