Last night, 1 of my squaddies took somebody along as a passenger on one of our sorties. Once airborne, we noticed the problem: The passenger apparently brought his previous ride along with him. We were flying Jugs, but the guy with the passenger had a Mossie occupying the same space.
This superimposed Mossie was visible to everybody else flying in the formation, and also to the guy with the passenger. IOW, it was 2 plane models stuck together at the cockpits, the Jug with the squad-colored icon and the Mossie with the green icon.
Never seen this happen with buff gunners. So maybe it's because the passenger didn't have a crew position of his own in the Jug?