I've had this issue happen twice now. First time I thought it was perhaps a fluke. 2nd time not so much. Heres the story. I parked my MX in the garage like normal and plugged it in for the night. Charging is supposed to start at 12:00am. Woke up the next morning to turn on the heater about 15 mins before I leave the house. I tried accessing my car via the App, the app connected to the car but shows no battery and ---%. See Attached screenshot. The car is also in an unlocked state. Turn on heater and see the air flow arrows but no temp or color changes showing that the heat was on. I go out to my MX and unplug the car and get in. Heat did not turn on and the MCU is off and not turning on. Try the reset but that does not work. Try it again, still no go. Wait in car 5 mins and the screen finally turns on by itself. Look at charge level and see that the car did not charge at all last night. Put in bug report after boot so if a technician worked on it they would see the timestamped area in the logs. This happened a second time about 5 days later. After this happened for the second time I called Tesla to see what was going on. Speaking with a tech, he connected to my car and saw that the firmware was good and saw no issues in the logs. But then asked what both my trip meter mileage was. Well Trip A had 16K and Trip B had 18K. Trip B for me is the "Lifetime" miles I've personally driven the car since. My MX was a demo vehicle and had 2K miles on it already so the odometer isn't exact for my personal usage. The tech stated that those are really high numbers explained that when the logs get full the car deletes old records, but it cannot delete everything it needs to if the trip meters are not also being reset on a regular basis. He said I was essentially filling my logs and the car was unable to delete certain data. I don't know how accurate his statements were but I reset them anyway. So far I've not had the issue again but I'll be calling back if it does. If this does resolve my issue in the long term then I hope this info can help someone else if they experience the same issue.