This started as soon we updated to the latest stable update.
On our dedi the following can and does happen in our stock edited mission.
Editor placed vehicles will be sunken into the ground for 1 client but not another.(choppers)
Editor placed land based vehicles will float in the air after use.
Script created infantry that are placed into building positions will be outside the building until shot at which point they will teleport back to the position they should be at.
If a player has been using a vehicle and then disconnects the vehicle he last used explodes.
(quite rare only seen happen on air vehicles)
None of the above was happening the day of the update before the update.
we where playing on our server at the time of the update.
After we updated and rejoined our server the bugs started.
Some but not all vehicles run a server side script that will respawn them when destroyed or when left unattended.
We also use a system that spawns vehicles on the server at the request of a client
The vehicles that he spawns will sometimes explode if he disconnects back to the lobby.
And upon creation other clients will see the vehicle placed and then see it turn to face the requested direction whereas the client who orders the vehicle see it spawn facing that direction already.
Another thing to note is that each client can see something different.
One client will see a chopper buried upto its rotor blades another will see it as normal a third will see it half buried.
We have even had an instance where a client took a chopper and flew 10km away
but for other clients the chopper was at base with its engine on.
One of our guys got into the chopper and was teleported from base into the chopper 10km away.
I hope some of this info helps get this anoying bug fixed.