Going to the create new world and having it maximized, clicking on more settings sometimes makes it freeze.

What I expected to happen was for it to get to the page with the settings.
The settings page allows you to give more world generation settings.

*What actually happened was that it froze
Minimizing and maximizing makes it go back to the "Select World" page.

Steps to Reproduce:
1. Start up Minecraft.
2. Click "Create New World".
3. Go to more world options the bug occurs now.