Still seems odd to me. I never thought it was a static issue. Never had that experience on my vaporshark. I leave my attys on mine with no loss of charge. Only time I had your experience there was a little water on the floor in my Boston Whaler and the outboard engine wasn't grounded properly. I got zapped up the steering cable into my stainless steering wheel great fun. If you haven't yet do make sure the battery tray is dry of ejuice. I vape mine plugged in with no issues. I will definitely be following your situation with interest. Hope you resolve it.
I've gotten a shock before, or more like a tongue-to-9vbattery type of slight buzz on my finger, but I think it was because my ring was right on the usb port. It's happened a couple times, but nothing ever more than a hmmm, what was that? Nothing like a holy cow, what the hell?!?!