@brevort The bug was both in the nether and overworld, but I have not tested the end yet. In the overworld I have explored it, and the nether, the chunks should have loaded in when I got near the fortress and when I got into the nether
@Matther Julain jusup i just created a new world then exited then i realized all my worlds gone
and
@Galaxy_2Alex i renamed the folder from saves to world saves
I have done it without optifine, and this is still happening. And just in case if you ask, the only thing I have used in that world is optifine, no texture packs, nothing. but I am using the datapack that adds everything expect for the warden and the skulk sensors