I drove with the truck to several bases to resupply them, and got killed, respawned and entered the same truck again.
I noticed after maybe third respawn and entering truck that the open door animation did not play correctly and I stepped into the truck through the door, with the door still closed.
A minor notice also on the truck is when throttling and turning at the same time, the hands on the steering wheel animation does not play smoothly.
Both needs more testing to reproduce.
EDIT: tested it more now. I can 100% reproduce the door anim not playing and the steering wheel anim when exiting the truck from drivers seat.