As in title, if quest requires e.g. "Pickup Gray Clay x4" then while having autostacking enabled forager bonus kicks in giving me a double (in process creating stack immediately), it does not count toward quest completion. For now I only encountered it during multiple pickups quests. Reproduced it twice (2 different quests).
Steps to reproduce:
1. Have "pickup" quest (with multiple items required).
2. Have forager credo completed fully.
3. Have autostacking enabled in client.
4. Trigger double pickup from forager credo bonus.
UPDATE: Apparently this bug occurs directly every time the quest item goes to item stack instead of equipment grid.
Currently reproduced on: clay, stone