Physical Vulnerability Down Overwrites Vulnerability Up in Cuff of the Father

[Teiren]

I suspect this very likely has something to do with this fix:

An issue with the marauder action “Vengeance” wherein the damage reduction effect would be overwritten by certain debuffs used by certain enemies.

The "damage reduction" effect is literally just a generic buff called Vulnerability Down, so I'm guessing that, for some reason, the fix was applied globally and affected Physical Vulnerability Down.

Time: About 1:00 AM Eastern
Frequency: Always
World name: Leviathan
Character name: Harumi Yuzuka
NPC name: Magitek Gobwalker G-VII
Monster name: Gordian Hardhelm, and any in the boss encounter of Cuff of the Father
Class/Level: Dragoon/60
Party or solo: Full Party
In-game time: Don't know, N/A
Area and coordinates: Alexander - The Cuff of the Father, Final area of the instance
Steps:
1. While piloting the Magitek Gobwalker G-VII, wait for a Gordian Hardhelm to appear.
2. Wait until the Gordian Hardhelm casts Physical Vulnerability Down on his allies.
3. Cast Meltyspume on any target with Physical Vulnerability Down.
4. Meltyspume's Vulnerability Up debuff will have no effect and will not be applied to any target with the Physical Vulnerability Down buff.
5. Physical Vulnerability Down will also directly remove (overwrite) an existing Vulnerability Up debuff.

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[Nymphchan]

Magic Vulnerability does not affect Vulnerability Up debuff. If this is also the case for A2S, we will have to change some things to compensate for it. Also if there are already Vulnerability Up Debuff on monster, a PHYSICAL Vulnerability Down Buff will remove the said Debuffs as well

[Teiren]

Okay, thank you for verifying that. I'll edit my post to reflect it.

Do you know if it even overwrites Ninja's Vulnerability Up debuff caused by Trick Attack? That would be plain silly, but I wouldn't be very surprised. Even though it's a different icon, it is the same name and effect. Or, reading it again, maybe you meant both the Gobwalker's and the Ninja's.