In a game I hosted today I got spammed by the desynch window alert, making the game nearly unplayable for me (had to close it every 2-3 seconds).
Then, dunno what happened, as I was about to cast a rain of ice, I lost the mouse cursor. The popup got stuck in the middle of the screen, and the game just wouldn't answer mouse input any longer.
I stayed in the game as I was host, but couldn't do anything. Had to kill the app to close it.
Suggested fix : make those alerts a non-obstrusive message at the top of the screen, and get rid of that modal popup !