That was a long summary!
When attempting to join an outdated server, then joining a singleplayer world and opening to LAN, the Social Interactions menu displays the name of the outdated server.
- Attempt to join an outdated server (you will be denied access)
- Open a singleplayer world
- Open the world to LAN
- Open the Social Interactions menu
- Notice that the outdated server's name is displayed, not the current world