2015 Ford Explorer drivetrain & axles problems

Tl* the contact works for a company that owns a 2015 ford explorer. While the vehicle was parked, the contact reached inside the vehicle to remove the key from the ignition and the vehicle started to roll backwards. The contact became caught between the door and the driver's seat when the vehicle started to roll backwards. The contact was dragged for approximately 4-5 feet before a teenager in the vicinity was able to enter the vehicle, place the gear into park, and stop the vehicle.

This vehicle is all wheel drive and comes equipped with a terrain management system to monitor and adjust to road conditions. I have owned the vehicle 6 months and have experienced a terrain management fault (failure) in the system which will disengage the power train and lose forward motion, I have had this happen twice in the roadway in forward motion while in traffic on a four lane roadway on the first failure and a two lane roadway in forward motion on second failure.