Quest: A Qiqirn Always Pays His Debts issue

Time: 6/9/2016 9:49 AM
Frequency: Always
World name: Ultros
Character name: Hanana Hana
Retainer name: None
NPC name: Bango Zango
Monster name: None
Class/Level: Ninja 60
Party or solo: Solo
In-game time: 9:03 PM Eorzea Time
Area and coordinates: Limsa Lominsa Lower Decks X:9.9 Y:11.4
Housing: None
Steps:
1. Accepted quest "A Qiqirn Always Pays His Debts" from Deputy Postmoogle
2. Attempt to complete objective "Return the undelivered letter to Bango Zango" by interacting with Bango Zango
3. Interacting with Bango Zango results in normal non-quest dialogue options, the quest marker is on the map, but no quest marker appears over Bango Zango's head
4. Attempts to fix the issue by exiting and re-entering the area, logging out and back in, and fully restarting the client have all failed.