If it is a CC character, check if there is a displacement map for the Body or Head materials. That seems to be one of the causes, although I have seen it in the final IC7 release. You can play a bit with moving the GI Anchor, as that seems to have an influence.
There are Feedback Tracker entries for GI glow problems:
2348 and also
2241.
If your issue is repeatable, you may want to add a comment in FT.