Died in Hardcore mode. Go to create new world and see my old death screen behind GUI

Died in Hardcore mode. Go to create new world and see my old death screen behind GUI

What I expected to happen was...:
I thought I'd be the dirt background

What actually happened was...:
I saw my death screen from my just killed Hardcore world

Steps to Reproduce:
1. Create hardcore world.
2. Die. (I got blown up by a creeper)
3. Go to single player and click Create New World.
(I was fullscreen)