I picked up my Model 3 two days ago, and set it up to use scheduled charging to begin at 12AM on a 14-50. The first night I can confirm it started at midnight and was fully charged by morning. But this morning I came out of the house to go to work at 7:30AM and it had just started to charge when I approached the car. I looked at my camera footage and the UMC started to charge at 12AM but then stopped 5s later and had a single light blinking (can't tell what color). My guess is the UMC sensed a voltage drop or something, which is odd considering my Model S charged on it with no issues for two years. And why would it start charging when it unlocked in the morning?