[Jay_]

From my understanding, what you're implying is that OnPlayerStateChange is not called when a player is warped from a driving seat of one vehicle, immediately to the driving seat of another. If so, in any event this behaviour is correct. The player's state is not changing as they are still driving a vehicle.

Many servers' scripts heavily rely on player states. If an issue like this was indeed considered legitimate, I'm sure there would be hundreds of complaints all over these forums. Please consider carefully before posting in future.