Problem about Servertravel in Steam

We are testing our multiplayer game on Steam. It is good when server creates session, and other clients join this session in Steam model. But our game has lobby, so the player should join lobby first and then use Execute Console Command, the command is "ServerTravel " to make server travel to the level and clients will follow server. This is good in LAN model. However, in Steam, only server can travel to level, and the clients will lose connections. So I guess should I add something before I do ServerTravel or is there any other command can solve this problem?
By the way our project is full BluePrint.
Thank you!

As it seems, Steam only works with Seamless Travel. We had this issue back then as well… :slight_smile: