Hi
If you are using SkeletonUtilityEyeConstraint and set the gameObject of your characer animation to not active, then you reactivate it again, the eye pupils are keeping their previous position at the point of disabling the character.
This means when you renable, centerPoint is taking the current incorrect position of the eyes, so the constraint doesn't work.
I thought it was worth pointing out. Not sure the best way around this, maybe store the eye position and reset them manually when you reactivate the character.
Chris