Ue4 Grooming TOOL SSS, BUG

HEy, im using the Grooming Tool for Ue4, its Awesome, but i have an Problem, the Skin under the Hair , on an Right Side Angle is just Emssive Lightning, any Ideas about it?

https://puu.sh/FlBvO/4893fa6739.jpg

thats really strange , i use the basic Hair Material

Thanks