At this destination there is problem with biggest building in front of me - AI will walk inside of it, and its unaccesable building. You cannot get in it. Put waypoint in place where 2 dead bodies (soldiers in the corner) are laying on this photo, observe how Ai will get into the building.
Order move your vehicle just like mine on the photo and order team to get in. You will see, how Ai will get in building on the right of me, and move through the wall to the vehicle.