3D Revolve Clipping
3D Revolve is clipping the front faces. I can get the faces to appear when the object is in a different rotation, when it object is parallel with the view. I've tried this with both a normal path and a compound path.
I think the plane the 3D object is being rendered to is too far forward.
Egor Chistyakov commented
I hope you kept the file? Email it at firstname.lastname@example.org for the team to test is. You can try to omit everything except for the shape, if the bug is persistent after that.