I had a base for a couple days in a official server and after lost it (tents, walls, barrel, contruction lights...) i guessed it was a persistance problem, but everything disappear (except the car) on the crash/reset of the server after i put a car inside of the car tent, but on that time i didn't realize the linking on this facts. So i went to another official server and built another base that last over a week. Yesterday i manage to get a car and put it inside of the car tent, and after the server shutdown only the car was leftover and all the structures disapperead, so i realized what was happening.