When trying to turn in the quest "Ammo for Rumbleshot" it took a very long time, over a minute, of me standing around next to the quest turn in NPC "Hegnar Rumbleshot", before the golden quest "?" icon appeared over his head and I could turn in the quest.
In the server log I saw this message at the time where I could finally turn in the quest:
WORLD: Received opcode CMSG_QUESTGIVER_STATUS_QUERY - for Player Rune (Guid: 6) to Creature (Entry: 1243 Guid: 265)
How come this update took so long? If I didn't know that this was actually the correct quest turn in NPC, I would probably just have run past him. Is there any way to tune how often this status query is done?
I have attached a screenshot of my standing next to the NPC with the quest and quest item.