Duplicated Worlds are Corrupt

Steps to reproduce the issue: Every time I try to duplicate a world it is corrupt.

Expected result: I expect to be able to duplicate a world and it not be corrupt.

Actual result: The save is corrupt and cannot be used.

See attached video, every time I save a duplicate world and then try to play it you can see what happens. This happens every single time I try to do it.

I have uninstalled and reinstalled Minecraft but get the same result this has only happened since the 1.21.81 update.