Copied worlds LAN switch not working

If you copy a world with the "Visible to LAN" switch off, the copied world will not be visible to LAN even if you turn it back on.

To reproduce:

1. Make world with Visible To LAN off.
2. Copy that world.
3. Turn on Visible To LAN on the copied world
4. Have Someone on the same wi-fi network try to join your world.

World will not be joinable.... 

World should be joinable.....