Slight update. I managed to get a bugged piece on Live. However the live server save must be made from earlier in the day, because I’ve been trying off and on for the past 2 hours to get that one item to transfer over to the PTR. So far it’s not even showing up. I went so far as to equip it on my Spiritborn. Log out completely, transfer over the saved characters to PTR, and it’s still showing what I had equipped 2 hours prior.
So for now I can’t say what happens to these items sadly, sorry I tried.