Since 2 days i have these disconnects. It seems like they are related to certain cards. For example just as im playing, every time i play Pen Flinger, the game gets stuck for a while, until the message "you have been disconnected" and "reconnecting" pops up and then i can continue.
Im playing on PC, never had that problem. Yesterday i had the same issue with another card, but cant remeber which it was.