crashed

Annoying bug

I was loading my minecraft world

after double-click to my world, it jumped back to main page.
Also i can't brake blocks on first time - have to dig dirt like 3 times to actualy dig it.

Steps to Reproduce:
1. open minecraft
2. ... click on singleplayer, then choose your world
3. It will jump back to main menu or to multiplayer, only after few seconds it will start your chosen world