Steps to reproduce:
1- Create a nether portal and enter in the dimension.
2- Return to the overworld, or exit world.
3- Remove all files in DIM-1\region (world folder)
4- Enter through the nether portal again
5- See as the nether is re-created, but not the portal.
Workaround: You must create a portal inside nether, to connect it to the overworld portal and escape from the dimension.
Attachments
Comments 2
Not are "random files", as documented on the game wiki, the folder DIM-1\region contains all region files for the nether. I wanted delete them to re-create the nether dimesion in an old world to have all 1.16 features without flying away.
[media]Source: https://minecraft.gamepedia.com/Java_Edition_level_format
Invalid, deleting random files can break your world