(Single-player tested multiple times)
When loading a single-player world, pressing the maximize window button causes the play-area of the screen to get stuck in the lower-left hand portion of the screen while the rest of the screen shows the sky color (Light blue). Can be fixed by resizing screen.
I have included a representation of what it looks like, because pressing F2 does not show the effect of the glitch.
Duplicate of MC-13691. I'd say that the description here is better, but the pictures there are more accurate.