When a playable unit is placed into a vehicle, its slot name in the multiplayer lobby will be the position of the vehicle slot, not the name of the unit. For example, check the attached screenshot here screenshot
Affects both 1.68 as well as the current 1.70 dev branch
Place an empty car. Place any unit or units and move them into the car. If you place e.g. a "Competitor" into a FFV seat of a prowler, the slot screen will say "Prowler (Light) Passenger (Left Seat 3)" instead of "Competitor".
Why this is a serious issue? The game presents a irrelevant vehicle position instead of whether the unit is an AT solider, Corpsman/Medic, Machine Gunner etc. The fact that he is sitting on the left or right seat is not helpful.