I searched threads throughout this forum and really couldn't find a clear cut solution to this issue. Liftgate will automatically open by itself when locking/unlocking doors, walking past rear of car, open again after I shut it. I have noticed that this only happens if I am in close proximity to the rear with the key fob. I have tested multiple scenarios where I will stand in the front, far enough away for the auto lock/unlock to not be engaged on the door handles, sitting inside the vehicle and the issue will not replicate. Seems like the key fob may have something to do with it when it is only within proximity of the liftgate but who really knows. Of course, Ford cannot replicate the issue but I was not there to show them in person.