These things happen to me on about 1/2 the flights in P3D. Ther Follow me car, will meet the aircraft, and start to head for the ramp. At some point it will stop. I stop, a good distance behind the car, and wait, and it will not move. Finally I slowly creep up to the car, and as I get closer, it starts to roll forward, then makes a sharp turn in one direction, then reverses and goes the other way, and then goes behind me and disappears. It usually heads in a direction away from the assigned ramp. This happens at different airports, like KBOS, KATL, KDCA, etc, all default airports, no payware airports at all. This started happening with the latest update. I have just learned to find the ramp where the GSX crew is waiting, by myself in those cases. Other people on Facebook have reported the exact same behavior. I also started a thread weeks ago about the same issue, sent in a BGL of one of the problem airports with a detailed description, and never got any feedback.