I had a blank screens incident this evening. After stopping at a store, I got back in, and drove away. The screens in the center were blank and stayed that way. I went through a drive-thru and shut it down briefly while waiting in line. That didn't help. Drove on and after a few minutes they came to life. Continued on for quite a distance and then decided to have navigation plot a route to a store. Just after pressing "start" for the route, navigation decided to reboot and knew nothing about the route it just plotted.
I'm fairly sure this originates as a "timing error." It has only happened when I quickly press the start button after getting in the car, and quickly press the brake and start button after that to start the motors, then driving off. A slower sequence of events such as getting in the car, pressing start, waiting for the screens to light up while I fastened seat belt, gave phone one last check, then pressing brake and start button seems to work better.
The navigation reboot is a complete mystery.