LOL! I havent bailed.
Good! I'm happy to read this, and think about your problem periodically and wonder what the solution could be. Jonathan's idea of a completely unrelated thing happening always at the same time is good out-of-the-box thinking and you have to do it, too. Mike's suggestion about leaving everything on and wrestling with connected gear is good, too. This includes shaking the console and all interconnection wires.
You have to figure it out and tell us about it. You can be famous for identifying and fixing a problem.
Again, good luck.
PS In your reply to my question about mic cables, you only address mic cables used as mic cables and not as drive signal cables from the console to the stage, which is what I was thinking when I wrote it. You have to check those drive lines, too, not just microphone cables.
Where are the wireless mic receivers located? If distant from the console how do the signals get to the console? Where are the antennae located? Again, if distant from the receivers, how do the signals get to the receivers? All those interconnect cables are potential problem sources if insulation is worn away or if connectors are miswired (pin 1 shorted to connector body either accidentally or intentionally by the builder) and something that channels the static electricity is touching the problem area of a wire. The zap could be happening in the console (if it's malfunctioning) or in a wireless receiver. Since we have the same consoles I want your problem to be somewhere else.