Minecraft shuts down when i go into a world with fullscreen. (Both singelplayer and multiplayer.)

I started minecraft and went in to a world with fullscreen as usual, but then so was minecraft closed down, no crash, the launcher came up too.

i tough minecraft should only start with fullscreen.

Steps to Reproduce:
1 go in to a world, server or singelplayer.
2. ...
3. ...