I've had my Model X for a few weeks. I keep it plugged in at night with charging to begin at midnight. I've noticed recently that when I go into the garage (without my key on me), the car headlights are on, suggesting the car is unlocked. I'll lock the car with my fob, and then 30 minutes later, I'll notice the car is unlocked with the headlights on (side view mirrors in the "out" position). Anyone experience anything similar?