World gets stuck “Generating World” when loading

Recently, whenever I try to load a world since 1.16.100, it will say Generating World for any amount of time from a minute to forever. After the Generating World completion bar is finished, it goes away, then gets stuck saying Generating World (without a bar), making seemingly no progress.

This doesn’t happen every single time, but more often than not it does. I can join my friends’ worlds, just not my own worlds.