I'v seen this glitch too, now I don't HAVE that set but I'v seen the glitch...So I MAY have a solution to it...but no promises.
I'v noticed the one type of leggings that you get in Rohan seem to trigger it, I'd try to get different leggings, try loads of different ones, I noticed that only CERTAIN shaped ones do it, but seeing as I do not OWN that set to TEST I can not confirm any of this, but hey...it's worth a try!
I hope this helped, if it didn't then Imma derp derp.
I use to wonder what friendship could be...
Until you all shared this magic with me!