Date & Time: 6:19 PM
Frequency: As soon as the hairstyle is equipped.
World name: Midgardsormr
Character name: Yvin Ophet
Party or solo: Solo
In-game time: 4:07 AM
Area and coordinates: Anywhere
Steps:
1. Be a female Viera (I don't know if this bug happens to other genders/races)
2. Equip "Practical Ponytails" from the Aesthetician
3. Emote or move in any way
*Add more steps if necessary

Screenshot: https://imgur.com/Q15Kzuw