When a bump map is used in the base material of a Layered Material, the first layer of the Layered Material produces incorrect results in the Diffuse AOV.
In the example below, I would expect to only see green and pink checkered squares, no black on the box.
Are you sure you are looking at the ‘CShading_SourceColor’ render element with the selection set to ‘Diffuse’? Because if you are, then your render is also incorrect, but for what might be different reasons. Because I see different shades of green/pink on the different sides of the box, and it should all be one flat colour with no shading.
