This bug is the result of going fullscreen after the initial launch menu. There is nothing displayed when going into the single player, multiplayer, realms, and options menus while in fullscreen. Upon going into a single player world while in fullscreen you get a very zoomed in and angled view of your world. Upon pressing escape you are greeted with a grayed over background but no menu. Here is a video outlining some of the problems of the bug: https://www.youtube.com/watch?v=U7aeU6oBQJQ