Groom Hair unusable for moving actors?

So Groom hair is apparently unusable, I can not understand why THIS is happening.

groomhairsucks

No matter what settings I have tried what I have disabled. I currently have No AA at all , I’ve messed with shadow settings I’ve messed with light I’ve watched probably a hundred videos and THIS is something I can’t fix. Hair looks passable in direct light but the moment you move into shadows or the hair casts shadows on itself you get this… red pixelated noise all over it.

Anyone else have this or know how to fix it?
Also this doesn’t appear to happen if physics is disabled.

Still have no idea how to fix this … bump