Thanks to everyone who took the time to check in with the thread and provide details on the issue! The team has been informed and is investigating the problem.
As mentioned by others in the thread, those overflowing with gold can repeat the early steps of the back item construction to continue through the process, though I would not recommend doing so at this time. Any time an item is unexpectedly altered or replaced by a different item altogether, I highly recommend that you start by searching for or starting a thread here in the official bug forum (while including as many details as possible about the issue…and pictures. We like pictures!).
For now, hold on to your items and keep your eyes open for updates on the matter – whether here or on another one of our official communication channels! Thanks again to everyone who have taken the time to keep us informed, and I hope you all enjoy the rest of the new episode!
Tl;dr: top men are on it!