Game freezes after moving the game out of the screen

The bug is created by moving the window outside of the screen.

Steps:
1. Go into chat mode/pause menu.
2. Move the game window outside of the screen (The center of the crosshair has to be outside of the screen.)
3. Unpause/Cancel chat/Type something in the chat. (The game is now frozen.)
4. To unfreeze you need to ALT+TAB outside of the game.