ORM Material not baking

Godot Version

4.6.1 stable

Question

Hello,

I am using a ORM Material and currently trying to bake a scene using a LightMapGI Node. The Light bake works for other Assets that are not using the ORM Material but the ORM Material (it´s a Meshinstance3D with a boxMesh) is black.

When i switch the ORM Material to a StandartMaterial3D then it works.

Is this a bug or am I missing some step?

Thanks!