I had something similar happen to me for the half sleeve on my arm. No issues until the very last session when the ink fell out where there was shading on my bicep area. Everything else healed fine but the shading for that area was just... gone.
Originally thought it might have caused by my sleeve rubbing across it, causing the area to become pink, as if the skin had been rubbed off. But the lines around the shading were fine. One and only time that happened to me. Got it touched up and now it's all good.
Ok. Thanks alot. Yeah, everything on the outside is healed as it's not peeling or anything anymore. It's just alot of the ink on the top of my shoulder didn't stay in. I know under the skin takes longer to heal. Iv never experienced ink not staying in before.