So sometimes, when I go to haven, get a lockdown match, or change of any kind of map, I just randomly get a blackscreen, and then I get sent to the login screen. When im on the login screen im not able to login again because apparently im already logged in, until I get automatically logged off (10minute or something).

I get a Failed to connect to server message. I really get this a LOT of times, and it makes me leave my guild behind when im on GvG or something.
Any solution?