On the last couple of games I’ve restored I’ve noticed that I get an occasional random firing of a particular coil. I have installed the Alltek trifecta in many games but have only seen this on the last couple. On Supersonic one of the pop bumpers will fire during gameplay, and the same goes for the left sling on Black Pyramid. I would assume that would be switch related but in both cases there is no score added when the coil fires as I would expect with a switch closure/malfunction.
I also notice that this seems to happen often right after the ball has been ejected into the shooter lane.