Issue with hosting then leaving and trying to join

So when I host with one instance, then leave and try to join another instance I get the following error in the logs

For clarification. This log represented an instance that hosted a lobby, quit the lobby using the in game menu, then tried to join another lobby.

You would need to close the hosted session when you leave.

That would happen through the IOnlineSessionPtr right?

I can’t remember off the top of my head. I do believe it is covered towards the end of the third section of the course. The editor tends to persist the connection until you close so this is generally easier to test by running from command line.