Problems using Steam OSS for LAN sessions

The client finds and joins a session on the LAN listenserver, but does not travel to the correct map. I have tried adding the “?bIsLanMatch” to travel url, I have even tried using seamless travel. It did not work for me, seamless travel simply makes the client travel to the default map, not the map the server is on…

I use ServetTravel(TraveURL) after hosting a session, and ClientTravel(TravelURL, TravelType::Relative, true) for seamless travel. And still cannot get this working, I would appreciate some help with this issue.