3 years post op, what can be causing lump and 'S' shaped scar that is lining implants? (photos)

After 3 years it’s more obvious and lump is red, which my surgeon claims to be soft tissue. When asked if its displacement, he said no. When we pushed the implant towards the butt crack (scar), the soft tissue (lump) protrudes even more. Can you provide your opinion on what this may be, even if its just a guess. If the implants are removed, can I just do a skinny BBL and sculptra. New scars have been a concern as well since the previous one was visible when in bend down nude.