Some of my bones are not effected by physics bones?

I can see they have the correct rigged weights in edit by moving the bones there, but when set as the root of physbones the bones don’t move at all.
And its only happening to some bones, for example my hair bones work fine as the root for physbones, but some specific bones just don’t seem to work at all. Any ideas for what I could be doing wrong and how I could fix it?

Update: Part of the problem was I needed to use end points on single bones, but I do have a chain of 2 bones where the first bone doesn’t move from phys bones at all still.