this has been going on for as long as I can remember. Lets say we get a troop transport insertion mission. I go pick them up and as I'm driving along they all decide to hop out way before the destination even if there is no combat nearby. This happens with combat search/rescues, and any mission involving AI transport. My only workaround is use ACE's join group feature to force them back in, drop them off then leave the group. It will do the same thing with only Alive and CBA installed. No AI enhancement mods.