This has been happening for the past two days. Every time me and my group join a high pop server we will begin to run for about ten minutes, then we will be all teleported back to where we were about five minutes prior. We will then begin to spin slowly towards the sky and we have to alt-f4 to close the game. This has happened on ten different servers, to each and every one of us. It's making the game unplayable and we will be taking a break from the game until it is fixed.