A link would be helpful (in this case). I'm still not sure what you did within the Placement Wizard in MCX. Was a model (inserting the PBR textures) created prior to you using the placement Wizard? You only gave us what worked prior (within SODE - at least that is my understanding of what you said).
The issue is solved now... The reason was an older version of MCX that probaly had bugs with PBR. Now I need to test to place PBR objects with SODE.
Here are some results of my PBR puddle I'm experimenting with:
Thank you for your help anyway!