I'm not sure why GPS would apply, maybe. Distance was a thought earlier in the day but the craft seems to want to move closer than I start at times on it's own. I actually found myself pulling back on the sticks. One thought I had was the elevation change. I climbed over 300 ft total in that clip and the switch of lock was always where the car would have been had it been on flat ground if that makes sense. I wonder if the algorithm is just expecting cars to stay on flat ground. It seems to lock onto people pretty well or at least it did before the update. I haven't tried humans after the update yet.