Thanks for the Screenshots.
Hmm... strange, i can't notice anything happening to my model, when i move closer to the Asset,
whether the hair, nor the body.
I have just a one spot light at this scene, as you have too.
View attachment 387628
And you are sure, this does not happen, when u use another asset?
It looks a bit like as this happens, because the object moves closer to the lightsource.
But at the end its hard to say, when i don't have this phenomen.