Hello,
Maybe try this solution, see if it works.
I add the layered blend per node at the end of the post process animation blueprint for the face. I tested if the face rig still works, or if the rig breaks somehow, so far I have not seen issues.
If in sequencer, you have a control rig track and an animation track on the face, and if the animation won’t play even if the control rig is muted, try setting the force custom mode on the animation in sequencer.