Renaming worlds removes them from their folders

[EinJOJO]

Steps to reproduce

Create a folder "test"
Create a world inside that folder "hello"
Rename that world e.g. "00/world"

What is expected?

World should still be in folder or it should be addable

What is actually happening?

1. It's not visible in the gui.
2. The folder forgets the world.
3. the world can not be added to another folder.

Server Info

This server is running Leaf version 1.21.4-524-ver/1.21.4@8757c36 (2025-10-13T03:43:50Z) (Implementing API version 1.21.4-R0.1-SNAPSHOT)
* You are running the latest version

Any additional comments?

No response

[EinJOJO]

Current workaround is to

1. unimport the world
2. import the world
3. add it to the folder