World fails to load after using /kill @e, /reload does nothing.

This might be an issue with commands, but I'm trying to make a showcase of 1.14 to show my friends who don't play java and I'm noticing that when I try to disable mob spawning using the command /gamerule doMobSpawning false and then kill everything onscreen by using the /kill @e command, the world breaks when I click respawn. I can't even view my own skin. I tried reloading the world using /reload and all that did was cause the message "Reloading!" to appear in the chat, nothing happened afterward. This is most likely a bug that will be fixed in the next snapshot but I wanted to bring it to attention.

I've only had this issue on my creative world, which I have set to Superflat. I haven't tried this on my survival world yet.

I've contacted Dinnerbone on twitter about this, but I thought to make a bug report about it as well.