[leong124]

OnVehicleDeath would be called it the vehicle falls into the water. It would also be called when it is destroyed in the trampoline. They're probably running the same code that the vehicle will be removed quickly, but the vehicle's disappearance isn't reported to the server in order to prevent "fake kills" of vehicle. Doing so will make the removal done is client side and cause this problem.
As Kalcor said, it is not an easy problem to deal with, I hope he can find some better solutions soon.