BLU Off-Guard skill resetting not on enemy kill

Date & Time: Jan 19, 2019

Frequency: Everytime

World name: Gilgamesh

Character name: Aelius Lophia

Class/Level: Blue Mage involving the Off-Guard skill

Relevant tool-tip information: "Recast timer is reset if target is KO'd in battle before the effect expires."

Party or solo: Both

Steps:
1. Apply Off-Guard to target (I've tested on striking dummies, and the first two bosses on Aurum Vale while farming for Glower)
2. Let the Off-Guard debuff timer roll down to just immediately past 1 (while icon is still on target but there is no time listed underneath)
3. Reapply Off-Guard (which is off cooldown at this point)
4. While target is still alive, Off-Guard will reset and the debuff will reapply, giving the caster the ability to immediately use Off-Guard again on another target.

Notes: At a 2.44s global cooldown timer, I was able to fit in exactly 12 casts of a spell like Water Cannon and consistently reapply and reset Off-Guard in this manner. Attached to this post is a video of me performing the bug.

https://www.youtube.com/watch?v=YMLxzX0iRuM