I think your bike and mine caught coronavirus and hopefully now have COVID-19 antibodies. Seriously, though, my bike has been running like nothing happened since it "dried out". Go on longer and longer rides until you feel confident in it again. If you have the time, download the logs and see if they captured the event. Your dealer or Zero might want to see them. I haven't been able to get the firmware update to work either. I read this isn't unusual, and one day it will suddenly work. Maybe that's something else your dealer can look at if they're open for repairs. Previously, it was sounding like your bike wasn't suffering from isolation faults, but the fact that now it's working suggests otherwise. You mentioned something about high humidity in your garage. If you think that might be related, is there anything you can do to mitigate the humidity. Riding often on warm days might help, but that's speculation. I hope you and I avoid what we've read about other bikes that needed to have the high voltage wiring replaced. Personally, I'm not happy with the way the charging port collects water.