rejoining superflat world and sometimes normal world crashes game. create superflat world, go back to main menu, try to rejoin

Version Info:

• 1.16.5
• 36.2.31 (but other versions have the same thing happen)
• 1.78
• 1.5

https://gist.github.com/Jetpack-Cat/9c8d8d72f42a676b3e3534613f7fa0b2

duplicate of #14

update Dungeons Enhanced