Quoted from chuckwurt:I doubt it’s electrical even though I cannot prove to you why that is the case. I just replaced a magnetized coil stop that would only stick if the game was on.
I've been assuming that some of the magnetism produced by the coil being activated electronically stays behind in the coil stop, which is why it will happen when the coil fires, but not when you hold it up by hand. I could be completely off though. In any case, I'd replace the plunger and coil stop just to cover all the bases--it at least *sounds* like a magnetized stop or plunger.