Freaky MS box

That is one nasty and well grounded hot wire there. You have a serious wiring issue.

FWIW, and it seems to be just me, but all but 3 of the MSD boxes I ever had were the worst purchase one could make. And they themselves repaired them only to fail.
Worst repair company I ever felt with.
Excellent service otherwise.
But I'll never go back to them if I can't help it.