Just happened to me. 80% on the software update and the car alarm went off. Glad I was still awake or I would have been pretty freaked out here in crime capital San Francisco.
I encounter this problem frequently. I have also found that switching to a streaming radio station, allowing audio to play, and then switching back to bluetooth, will resolve the problem.
It appears to be a software bug.
I own a 2014 P85D (with ~30k miles come to think of it) ... and I love the car. It's awesome. It feels FAST -- like, REALLY fast. That being said, an 85D or 90D would suffice for my needs and are still very fast cars.
This part is particularly of interest: "Please note also that using a self-driving Tesla for car sharing and ride hailign for friends and family is fine, but doing so for revenue purposes will only be permissible on the Tesla Network, details of which will be released next year."
The two circumstances in which I could see a driver fleeing are either that the driver is drunk and doesn't want to be breathalyzed at that point in time, or car was stolen.
In a 40 mile drive today, the large display rebooted 7 times and then during a short 3 mile drive, it rebooted once. The car has been fully off for a few hours so I'll test again later.
I consider it to be the least tolerant liberal place that I've ever lived. As long as you subscribe to the local culture, you'll be accepted. If you have an ounce of capitalism or conservatism, then they want you gone.