Bag of Jewels
I got my bag of jewels from the vendor in the guild hall and it also does not work in the forge.
Sounds like those bags have gotten a wrong iD somewhere during an update. Be sure to send an “in-game” bug-report (via /bug or via game-menu>support>report a bug), as they are more likely/faster to gain attention from the proper departement.
Kittens :3