Monstrosity - Xenoglossia bug

Operating System: Windows 11
ISP: Sky
Type of Internet Connection: Optic Fiber
Internet Connection Speed: 500Mbit/s
Date & Time: October 14th, 2025 at 21:01 BST
Frequency: Always
Character Name: Qiqirnmercenary
Race: Hume Male
World: Asura
Main Job: Blue Mage
Support Job: Dragoon
Area and Coordinates: Mount Zhayolm (I-10)
Party or Solo: Solo
NPC Name: None
Monster Name: Hilltroll Paladin

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 Flan (BLM variant).
3) Enter any area via the Odyssean Passage in the Feretory. In my case I went to Mount Zhayolm whilst not under the effect of Belligerency.
4) Attack a monster until you have 1000TP. I used a Hilltroll Paladin for this.
5) Use the Monster Skill Xenoglossia, making the next spell cast instantly - Similar to Red Mage's Spontaneity.
6) Use Elemental Seal to enhance the Magic Accuracy of the next spell casted.
7) Notice how Xenoglossia is used up in the process before it wears off, despite Elemental Seal being a Job Ability.
8) Repeating step 5 and then using any other Job Ability on any variant of Flan does not remove Xenoglossia's effect before wearing off.
9) Additionally, I exited Monstrosity and changed to RDM99/BLM49 in Port Bastok, as Xenoglossia is similar to Spontaneity. Outside the Mog House, both Spontaneity and Elemental Seal can be used at the same time before wearing off after 1 minute.