This is extremely anoyying when you are playing in servers(such as CubeCraft, lifeboat, etc.), you can be in the middle of a round and exit to check something online and boom you just left the server and have to restart by going through the matchmaking process again.
Please fix this as soon as possible,
Thanks
David
This only occurs in fullscreen mode, because when you switch focus off of a window that is in fullscreen mode, Windows minimizes the window. You can toggle fullscreen with F11.