Hi ,
It appears problem is that when you switch possession to new vehicle, old vehicle wheels continue to send RPC’s to server. This is because wheels incorrectly (this is bug) think they are still possessed by original player controller.
Because of log spam generated, server disconnects client, and you are now a listen server, and no longer connected to a server (this is why it now works second time).
I’m looking into a fix now, and hopefully this will be fixed soon.