Fullscreen Making Me Force-Quit Minecraft

When the screen "You Died!" appears, toggling full-screen using F11 will make the Respawn and Title Screen options unclickable. Also, when not on fullscreen and attempting to quit Minecraft, you get a server error message.

Attempting to screenshot this glitch would give me a picture of the void. I could only screenshot this glitch when the rest of my desktop was visible, as shown in the second picture.