Question Mirror AdditiveLevels example. how to unload correctly from host?

Hello i got a problem in mirror
i would like to unload scene for the host but without removing the level like in the AdditiveLevels example but i can't seem to replicate it.
It does work for clients but for host the objects are still visible from both scenes
how do i hide them? the same as the example, when the client change scene and when the host change scene both of the item the objects of the previous scene are hidden.
The issue is that i see the objects from the previous scene. this isn't getting called in the host but still works in the additive example

Code (CSharp):

1.          if (mode == NetworkManagerMode.ClientOnly)
2.             {
3.                 yield return SceneManager.UnloadSceneAsync(sceneName);
4.                 yield return Resources.UnloadUnusedAssets();
5.             }