SceneManager.LoadSceneAsync and lightmap/GI issues (5.3.0f2)

Hi, I'm attempting to remove loading pauses from my game by loading the next scene additively in the background while the first is being played. However, I am running into issues with the lightmaps/GI.

As soon as the next scene is loaded, i turn off all it's parent gameobjects until they are required later.
However, the scene's lighting settings and lightmaps seem to be applied straight away when the scene finishes loading.
I would prefer to control them manually and turn them on and off when needed, as i can do with it's gameobjects.

Is there a way I can control when a scene's lighting settings are applied after loading it asynchronously?

 

I'm also getting error messages when the 2nd scene is finished loading:

!m_UpdateManager->HasSystem (guid)
Error adding system: Failed to allocate system.
!m_UpdateManager->HasSystem (guid)
Error adding system: Failed to allocate system.
...
GI output for inputsystem: 25116a3e93dc2545b0f617e8560cd3a1 (c5fa902d3de70f50001ba2251885bfa2) is missing.

and on the 3rd, 4th 5th scene etc.

m_Systems.empty() || !m_Scenes.empty()
!m_UpdateManager->HasSystem (Hash128ToGuid (iter->guid))
!m_UpdateManager->HasSystem (Hash128ToGuid (iter->guid))
...

Any help would be greatly appreciated!

 

Cheers, will do.

 

Just submitted a bug report with an example project attached.
Case #749008/748111

Thanks!