Due to the connection issues, it’s been more than a couple sessions so I don’t have the game logs anymore.
This is what happened: My friend and I acquired Erza’s Ledger, and were on our way back to the Council Chambers, but I had to disconnect due to the US Server connection issues. My friend hands in Erza’s Ledger’s quest and Avarice is dropped on the ground for them. They pick it up. I join my friend’s party and portal to their instance. I hand in my quest for Erza’s Ledger. The quest is completed for me, but no reward item drops on the ground. It is not visible at all. I’m not using a loot filter, and grounded tooltips are visible.