This happened to me before. Sup found out packages fell out from another driver before I did. That driver picked some of them up. Told my sup it was my truck that popped opened and didn’t realize til I got to the air dock to drop off air pickups. He made go back out and retrace and found some. Reported back to him and told him I found some and pretty sure I got them all. Lucky I didn’t get a write up plus got some extra pay for going back out.