Tesla just bought my Model X back a little over a week ago as it was having tons of issues. I had the same issue that is listed here along with a bunch of others. Since I ordered another Model X they kindly gave me a loaner Model S until the replacement arrives. It was great for the first few days then one morning the GPS got stuck, I got a steering assist reduced car needs service notice and a notice saying the emergency braking system had been disabled. It seemed strange for it to start having all these issues at once. The only change I made was the night before I setup HomeLink. So I removed HomeLink and reset the MCU. It took about an hour for the GPS to start working again and I have not had any issues since. Both of these vehicles have AutoPilot HW2.5.