Multiple scene editing errors.

Scene & World Building
1

When running a scene which additively loads another scene, while having that other scene loaded in the Hierarchy I get these errors (when I stop play mode):

Errors

Multiple managers are loaded of type: SceneSettings
Multiple managers are loaded of type: RenderSettings
Multiple managers are loaded of type: LightmapSettings
Multiple managers are loaded of type: NavMeshSettings
Removing duplicate game manager (RenderSettings)!
Removing duplicate game manager (LightmapSettings)!
Removing duplicate game manager (NavMeshSettings)!
Removing duplicate game manager (SceneSettings)!

If I unload the secondary scene and run the game, I get (when I start play mode):

Errors2

No path have been set on the LoadSceneOperation
Unknown error occurred while loading ‘’.

And my unloaded scene appears 2 times in the hierarchy (until I stop play mode).

Possible bug?

EDIT: I am using SceneManager to load all of my scenes

2

The first errors: “Multiple managers are loaded of type: SceneSettings…” are currently being fixed.
But for the second error could you report a bug with repro steps (“No path have been set on the LoadSceneOperation
Unknown error occurred while loading”)?

Thanks