I've never seen or read about this problem before, but the other night when I loaded up Google Maps through the car navigation menu it took a very long time to locate me but when it finally did GPS was telling me I was somewhere in Pennsylvania when I was actually in North Carolina. Additionally the GPS was tracking me headed NorthWest through Ohio without following any roads. It appeared as if it was actually tracking something that was flying in a relatively straight line. I tried to restart the app but it continued thinking I was 500+ miles away. Ultimately I restarted the phone and that fixed it, but I have no idea why that would happen in the first place.