Anyone else having any issues? I have the 2018 plugin non-touring, and starting from about a week or so back the 12V battery has been dying on me between uses (sometimes, if I just shut it off, it immediately isn't able to start back up). This was severe enough that once — last night — I was actually unable to shift transmission gears for a while even though the car was started and the 12V was still hooked up to an external power supply. With the exception of last night, once it's been started it seems to drive perfectly fine without any issues. I have left the 12V charging overnight on multiple occasions now (and performed a 24-hour conditioning cycle), and I've also tested the alternator and inspected the battery's visual window indicator, all of which appear to be fine. Making the assumption these indicators can be trusted, my next inference would be a parasitic battery drain, but I have no idea how to confirm this. Any ideas or experience with this issue?