When playing Minecraft and the game crashes, pressing space instantly logs you out. This is because the play button is unavailable for a short period of time. This is highly inconvenient, because you can't possibly predict when your game is going to crash, and so if you're pressing space to jump ingame just as it crashes, you'll be logged out of the launcher before you even realise it crashed, and you have to retype your email address and password. For a fix, I suggest adding a dummy button that does nothing except being selected automatically when the play button is unavailable, or rearranging the order the buttons are selected.