Material Preview doesn't display normal/opacity?

If I mouse over a substance, it shows a sphere preview of that material. However, the preview doesn't seem to enable either the normal or opacity channels. For example, here's me mousing over a material, which looks like a plain metal ball in the preview. But you can see the actual material, when chose, on the mesh here, with all of its triangular normals:

I've tried changing the "Material Preview Shader" in settings, but it's already using pbr-metal-rough. Is there another setting I'm missing to getting these previews to actually render properly?