5.4.0b7 Unexpected MonoBehaviour being transferred

I get this error on loading a scene:

Unexpected MonoBehaviour being transferred. Expecting transfer of MonoBehaviour 'ComponentLibrary', but MonoBehaviour being transferred is '(null)'

Its a bit cryptic so what does it actually mean?

 

I get this too in 5.4.0b9

 

I get something like this too. No progress on solving it?

 

Bug report please? And share the number after once you receive it.

 

Project too big. If you could give us a hint as to what that error means and why it might show up, maybe someone could narrow the problem down to a small repro project.

 

Looks related to the issue I posted: http://forum.unity3d.com/threads/unexpected-recursive-transfer-of-monobehaviour.388698/#post-2542466