Resizing the Minecraft window while dead grays out the Respawn/Exit to Menu buttons and several other screens

When you die and then resize your window, the buttons for respawning and quitting are unusable.

Steps to repeat:

1. Load a world.
2. Die.
3. Resize the window (maximise, minimise, manual adjustment)

Alternatively

1. Load a world where the player is already dead.
2. Resize the window.