I played on a US - 1st person - public exp .56 server.
For example, if u go in a house and drop a vest or clothing or some item, it could be, that this item got teleported away and isnt at the place where u dropped it. With 0.55 I didnt notice this problem, maybe this occured, because the server was laggy, but I also tryed another server and same things happened. If u go around the building where u dropped the item, it could be somewhere there on the ground. But also it could be teleported to other items which are around.
I think its a known bug and I also had this issue with earlier versions of the game like .54 or earlier. But with .55 I never had this issue.