How to resolve hoodie string crazy-bouncing in MovieRender Queue?

My metahuman’s hoodie strings now bounce around like crazy the entire take! I expect they are colliding with the head-mesh collision after retargeting the skeleton but not sure.

My metahuman used to render OK, but after recording facial expressions with FaceLink I had the skeleton issue where the head is lowered into the body. I followed THIS tutorial to fix it by repointing the recorded take to what I believe is the correct skeleton, but now my hoodie strings jump around all the time when recording to Render Queue (but not viewport).

I have searched the forums and youtube but am at a loss :frowning: Kindly please help guide me.
Any tips are greatly appreciated! I’m new at this but not sure where to start.