Scenegraph Skipping collision checks - possible issue or me being silly

[DavidTully13]

Hello,
We have a physiJS scene and added our Physi.boxmesh to our scene.
We then added a THREE.Group inbetween the Scene, and boxmesh children, so from this;
Scene
-Boxmesh1
-Boxmesh2
To this
Scene
-Group
- -Boxmesh1
- -Boxmesh2

But the collisions are not work. The boxes are visible.
Could someone confirm that PhysiJS Scenegraph will go through the children of none Physics objects. It would make sense why it would not check their children, but just want to make sure.

Thanks in advance.