The bug

After reopening Minecraft and deleting a world, the world list fails to load, and the player is only presented with the "Loading world list" message. When exiting the Singleplayer menu and returning, the worlds are once again visible.

Here is a video.

How to reproduce

1. Create a new world
2. Exit the world
3. Close and reopen Minecraft
4. Delete the world
   Other worlds fail to populate in list