Copying my post from another thread.
1) A Craftsman's Work - After killing NM 'Decurio I-III', and clicking on the ??? for 'Altepa Polishing Stone'
will spawn 'Decurio I-III' once again instead of receiving key item 'Altepa Polishing Stone'.
Status - Confirmed.
Work-Around - None.
We completed this quest (DRG AF1) for a linkshell mate a week or two ago. Ended up killing the NM ~7 times before he got the key item. What worked was dragging it away a little bit from the ???, and having the DRG spam click the ??? as the NM was on its final 10% hp. I believe he got the KI right after it died before the corpse despawned.