Monstrosity - Flan Instinct III discrepancy

Operating System: Windows 11
ISP: Sky
Type of Internet Connection: Optic Fiber
Internet Connection Speed: 500Mbit/s
Date & Time: October 14th, 2025 at 18:45 BST
Frequency: Always
Character Name: Qiqirnmercenary
Race: Hume Male
World: Asura
Main Job: Blue Mage
Support Job: Dragoon
Area and Coordinates: South Gustaberg (L-10)
Party or Solo: Solo
NPC Name: None
Monster Name: Vulture

Steps:
1) Enter the Feretory via any Odyssean Passage. The one I used in this instance is in Port Bastok at (K-12)
2) Go to the Customization menu and change to any Monster that can cast spells. For this test I used Treant level 60.
3) Go to the Faculties menu and equip Flan Instinct III only, no other Instincts.
4) Head out to any area via the Odyssean Passage inside the Feretory. In my instance, I went to South Gustaberg whilst not participating in Belligerency.
5) Cast a magic spell with a long casting time on monsters to see if the "Quick Magic" +12 attribute on Flan Instinct III procs. For my testing, I casted Flare on Vulture 100 times in order to get a big enough sample size.
6) Notice that Quick Magic does not proc, and always leaves Flare casting until 75%-78%