[derekp7]

On my Ford Sync 3 system, when I plug my phone in to use Android Auto the GPS sometimes goes haywire (the map keeps spinning in random directions like the car is drifting at sea out of control). Rebooting the phone doesn't fix it, only pulling over, turning the car off, and opening the door (so the infotainement system shuts down completely) fixes the issue. Based on this, I'm assuming that Android Auto gets its GPS from the car's GPS unit when plugged in, as the car GPS would have a better signal than the phone sitting down in the cup holder. If the phone isn't getting GPS signal from the car, then something the car is doing is seriously jamming the phone's GPS signal until the infotainment system gets rebooted.