first of all i'm french and my english expression isn't really good, hope you will understand me :x .
I played since the previous closed beta and i didn't have this problem. Since 2 days when a game start and "Press any key to continue" appear i can't do anything. I mean i can't moove my mouse, go to an other screen, alt + tab or whatever but when i press a key i don't spawn in the game.
I don't have this problem when i join a game who have already started (they don't have this screen when the game already started).
At the begging of this beta (26 - 27 march) i didn't have any problem with this screen :° .