An Obscure Question

     Sometimes I upload PDF versions of photos of a part of a client's using Social Security's Electronic Records Express (ERE) system. I do this to demonstrate the client's physical impairment. It might be photos of swollen ankles or severe angulation following a poorly healed bone fracture. In one memorable case, it was astonishingly extreme gout.
     Photos to demonstrate physical impairments work only if they can be viewed in color. I've seen color PDFs uploaded to ERE stay in color in years past but then that seemed to stop. However, I've recently seen an ERE file that included medical records that had color documents in it that stayed in color.

     What's the deal? Will color PDFs uploaded to ERE stay in color or not? Is there some special technique to use?
     Update: A friend provided a link to a section of Social Security's POMS manual which recognizes that some ERE documents need to be in color. It mentions scanning them in color. However, I know I've seen color documents converted to black and white by Social Security's system. In fact, up until last week I don't think I had seen anything in color in ERE for years.