I just returned a dull blade and a stone club to my "expired items". In there I had rk leggings and charred leggings. The dull blade and both leggings bugged away and were not to be found in my expired list.
This bug is already known about. The only way to get a refund of your items currently is by having video proof. If you happen to have a video of it, it would be great if you could send it to me on discord, AppleTree#5276 .