All civil units. Player unit has been set to independend side with a grouped independent unit that has been set to 'pressence false', the old arma2 way of setting different side for civils. (so the joining AI will become (green) independend side too)
Placed 3 ungrouped AI units with a trigger 'joingroup and setplayable'. After they are all in the group they start to show this buggy behavior. Test mission included.