Used to happen to me a lot back in the EM days. With my (very) limited budget I was always happy to let it go until it passed all the free game scores.
That happened on my Bally Hi Deal all the time. Funny as hell and sure helped my score.
For newer games, I'm betting such a burnout could be prevented. Have the CPU count if the pop bumper's been going off too many times in such a short interval, have it take a time out for a second(ball rolls away), and it's back to normal.
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