Single Player and Multiplayer Setup

Hi, I have a strange situation.

In general I have a main menu with the option to play Single Player or Multiplayer.

Singleplayer Button opens Single Player Map with the “open level and the game mode alias for Single Player” - That works fine.

Multiplayer Button opens another widget (host/ join session).
In general it works fine, also the options in “open level” works, like “listen?Game=Multiplayer”.

When I try it with a setup in the editor (Standalone, 3 Players):
My actual issue is, when I try it in the editor, the first standalone session who hosts a session doesnt get the right Player Controller assigned (not the right game mode) and doesn’t see the menus.
Session 1 and 2 and so on… are able to see them, only the hosting player (always) doesn’t see those menus.

Try Play as listen server 2 players the go to 3.