It sounds like this is a bug for this update. As well, the server could be down but is still showing as being up. Have you tried restarting your browser?
I have been playing on a few servers i noticed that when i leave and come back all my stuff is gone. This is very disappointing because i would like to build bases with my friends but if we loose all of our loot its just no fun. Is there any plans on adding a saving aspect the game?