Two Bone IK and Multi Aim Constraints transform always gets reset

I’ve set up a character prefab using some Two-Bone and Multi-Aim constraints from the Animation Rigging package. This character is then nested inside other prefabs, and I move those constraints to put the character in a specific pose. Every time I save the prefab, close and reload it, the constraints have their position completely reset. Is there something I am missing, or is there a way around this? I’d like to keep the constraints in the position I’ve left them in the prefab.