Can't turn in crafted Ishgardian Restoration item

[Aksel]

Date & Time: 8/31/2021 9:00 pm
Frequency: 1
World name: Excaliber
Character name: Aksel Karlsefni
Class/Level: Culinarian/65
Party or solo: solo
In-game time:
Area and coordinates: The Firmament x12.2 y14.5
Housing:
Steps: Turn in Item to Potkin
1. Fourth Restoration Phase - Grade 4 Skybuilders' Sesame Cookie
2. Attempt to turn last one in from inventory
3. NPC does not register item in inventory
*Add more steps if necessary

[ICountFrom0]

If it's the last one in the list, means it has the lowest collectability. Means you probably didn't quite make the minimum on it.

If that isn't it, post a picture?