[Substance 3D for Unity] asset loads only 1 graph

Hi,

I'm using the "Substance 3D for Unity" asset for a bit now and never had any real issue until now. Since last update, Unity only gets 1 graph of any substance i try to import.

So for example i have a ceiling substance whith lights, and i like to separate the ceiling in a graph, the light in an other and then merge the two in a third graph. But now when I import the substance in Unity, i only get the ceiling's graph without the rest. I get the same issue with any of my multiple graph substances.

Do i need to get one more step in my workflow now ?

Substance 2018 (Steam) - Unity 2020