First off, the car issue. Recently (on private server) regardless of the quality of any parts on the car after a server restart random cars will disappear. Most commonly happens at bases with 2+ Cars. As for item desyncing, we have items getting stuck in containers. This happens when moving anything from characters inventory to a container i.e: Vehicles, tents, barrels, sea chest's, even backpacks on the ground. Its also happening when swapping items from hands to inventory. The only way to get around this has been to drop everything on the ground first, then moving them to where you want. As you can imagine this is very time consuming.