Signs can be edited in debug worlds

Debugging Signs

Signs and hanging signs can be edited in debug worlds, which should be impossible as block states cannot be changed in debug worlds.

 

Steps to reproduce

1. Create a debug world
2. Open the world to LAN with "Enable Commands" on
3. Switch the gamemode to creative
4. Go to some signs or hanging signs
5. Edit them
6. If it fails, the signs might be waxed.

Bug showcase