I haven't heard of this as associated with autoimmune disease and don't quite see how it would be, although I don't know what I am talking about. Apparently it might be associated with certain HLA tissue types and blood group A, but I have no idea if that has any relationship to the HLA types associated with autoimmune connective tissue diseases.
There are treatments available that can lessen and ease them. My mixed race grandaughter has what I think might be slight keloid scarring on a knee that has been frequently cut and badly grazed. The darker the skin the more likely keloid scarring is. The only 'scarring' I have had from surgical incisions for breast biopsies was red, rather raised and obvious for several years before it gradually disappeared altogether. It certainly wasn't keloid. Discoid lupus can take hypertrophic forms in all races, but that is distinct from keloid scars.
Interesting question though, and I will add it to my list of questions for my 'tame' specialist dermy.
All the best and hugs