In one of my missions the group assebles together in the woods on Stratis. I order two AI to get into an offroad gun truck which they do. The player drives a second vehicle. All efforts to get the AI to move have failed, whether by setting waypoints on a map, regrouping. When I team switch to the AI he hasn't even turned the engine on or tried to move. I move his vehicle up to the players vehicle, switch back and the AI then follows orders as normal.