The interface for the blood fountain (bloods shard salvage) will "eat" or destroy items if you lose connection, logout or exit client while the items are in the interface, but before redeeming/submitting.
While this issue is relatively minor and uncommon, i have had this occur several times when playing on a spotty connection resulting in item loss, and it is an inconvenience for those effected.
1. Submit items to blood fountain shard salvage
2. Before redeeming, log out (via interface escape then normal logout) or simply drop your connection/close the client.
3. On logging back in, your item is gone.
DO NOTE - This will likely occur in the blood diamond fuser and potentially also bloodcore token synth. It would be smart to audit your other custom interfaces as well to ensure there are no other occurrences of this bug as i did not perform an exhaustive search.