Rendering Artifacts (Get Fit Product in iray)

AlienRenders

I'm getting some weird artifacts when rendering Get Fit Stockings. See attached image (I should have perhaps chosen a darker background). There are some weird squares all over. It only does this for dark colours and if there is a dark texture for Base Colour. It does this for another set of textures as well that has dark areas. If you remove the texture, the artifacts go away. I checked the image and it's just a solid color. I even tried it with a custom image and same thing. The attached image is with removing all other textures, so no bump maps, no normals, no top coat. Anyone have any ideas? I don't remember if this was happening before or not. Never really looked that closely. I did just update my GPU drivers to 471.11. I have 2x 1080Ti's.

edit: I found some older renders with this same product and it didn't do this before.

edit2: CPU render has the same artifacts. So something tells me this was caused by an update in DAZ Studio. I have 4.15.0.2. Guess I'll submit a ticket.

edit3: Submitted a ticket. It's happening on all products for me.