I was switching around between servers while playing and then when I refreshed the server page all of my servers disappeared. I tried to add them all back again only to find when I logged off a server, they were all gone. I tried restarting my game and looking through the folders in my libraries to see what the problem was but was not able to find anything. A few of my friends have also had the same problem so I don't believe it's anything to do with my computer.