Car has been intermittently reporting that it is supercharging while plugged in at home. Happening on a brand new UMC and an older UMC. Service has looked at it once and now is going to be looking into it again. Posting to see if anyone else has run into this issue and what solutions were employed. I'll be passing them along to service center. Center screen reboot fixes error for some amount of time but it always has returned. Have not actually supercharged the car since error started to occur. Car has dual chargers, but I doubt that is contributing.