That is a bug I have not seen in 4.1, nor has anyone reported it. I have overhauled the armor system in the current patch I am working on; however, going to look to make sure the bug did not transfer over. I am sorry for the trouble. It might possibly be a glitch with a Talent (Dragon Guardian Talent specifically), try resetting your Talent Points or if the dragon form is glitched (try transforming, then use the Revert ability).