Had the same issue - Twice. Took delivery on my S in September 2017. First time this happened, I called support and they said they would dial in and fix it. They said were going to remotely restart a module. After their restart, I was told that I would need to initiate a second restart (hold down both buttons on rhe steering wheel) and then wait about 45 minutes. Very hokey. It did however fix the issue. Sadly, this just happened to me again. The vehicle is just stuck on the GPS map. I restarted (again, holding down both buttons on the wheel) but no joy. More interestingly (and annoyingly) the speed limit sign on my dash says the speed is 30 (based I suspect on the GPS location) so now autopilot wont engage on the highway that I am on now. Called service - waiting to hear back.