Redensity 1 Booster - I still have bumps where it was injected

I have had 3 previous treatments of redensity 1 booster under my eyes and loved it. Post treatment for all 3, I got the little bumps and a bit of bruising but by the end of the day, the bumps would be gone and I would be left with just bruises and a bit of swelling. This would then get better over the next 2 weeks. However a week ago I decided to get a 4th treatment. It had been 5months since my last and I went to the same place and same injector. This time same experience, however a week on and I still have the bumps where it was injected and they don’t seem to be improving. I am not sure why it has done this. I have been back to the place and the dr that did it said he’s never seen it do this before and he’s taking it seriously. I am just wondering if anyone else has had this experience before with redensity 1 booster. It’s really effecting my mental health, as it’s ruined my face and I am ashamed to go outside.