Check out the highlights on the lower leg straps -
The highlight disappears without the body model -
As far as I can tell the problem has to do with the interaction between the main overhead light, the straps, and the body. Take that light out, or the body out, and it’s fine. Put them together, the problem shows up. Turning off SSS makes no difference, turning down the intensity of the light makes the artifact less bright, but it doesn’t go away. It doesn’t make the highlights look the same as when the body is hidden.
Here’s the .blend - Link