I have a lot of gear in my camp and I'm constantly moving bags, picking a new one up, rearranging bags and moving stuff elsewhere. The private server I'm on did a lot of resets in the past 120 minutes, and for the third time now altogether, I was moving stuff around and the server reset (No message received...)
Upon respawning into the server, I noticed that certain gear had disappeared and other gear had duped, meaning a backpack I had picked up was in my character inventory and also a second time on the ground.
Other items I had, like a second main rifle, disappeared.
A clever admin can exploit this to dupe gear. I think that all you have to do is drop a bag, reset the server and quickly pick the bag up, or something similar like that.
In any case, the server and characters are not saved in sync.