Visual Bug: Vanguard Mask of Scouting puts strange item in mouth

Equipping Vanguard Mask of Scouting creates an unknown purple object inside the character's mouth. This can't be intended, right? ......right?

https://i.snipboard.io/Dlj3Ar.jpg
https://s3.amazonaws.com/i.snag.gy/avmsqS.jpg

Date & Time: 7/15/24
Frequency: Always
World name: Goblin
Character name: Hironaga Iteya
Retainer name: -
NPC name: -
Monster name: -
Class/Level: Viper/100
Party or solo: -
In-game time: -
Area and coordinates: -
Housing: -

Steps:
1. Equip Vanguard Mask of Scouting
2. Toggle 'Manually adjust visor' to remove mask
2. Use emote/manual expressions to see inside mouth