Automated "Animator Friendly Rigging" 1.0.6 for Maya (maya script)

This is a genius script but I've come across an issue with the right arm. The r_upArm_orient_anim icon is flipped to start with but it seems there's something else going on. If you raise the arms above the head and bring them together the right arm shoulder area will twist and lose volume whereas the left one works perfectly.
Took me a while to find this as the script is so good. Thanks for making and sharing it!!!