Java error when entering fullscreen and starting a world

I expected to start a game in full-screen mode, instead I was given a java error, and redirected to the multiplayer server menu

Steps to Reproduce:
1. Start Minecraft
2. ensure minecraft is NOT fullscreen
3. go into Single player
4. double-click a world & then immediatly press F11

this should appear: connection lost:
Java.lang.CalssCastException: bju cannot be cast to fm

5. Minecraft will then redirect you to the multiplayer server selection menu.