Eternal disconnecting

[lao]

In the last few days, I've experienced eternal disconnecting from a server (in the server deployment screen). Two "disconnect" menus are visible: one in center and one on the left.
Last time it happened, I pressed escape to go into the server choosing menu, then I clicked on a new server without having disconnected from the previous one. In the prompt that appeared I clicked "disconnect", and then got this eternal disconnecting. Had to restart the game completely.

OS is Windows 7.