Possible bug in Faire Joi equipment (not showing necklace)

Date & Time: 08.08.2017 to present
Frequency: Always
World name: Behemoth
Character name: Angely Lowell
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/Level: DRK/70
Party or solo: Solo
In-game time: All day
Area and coordinates: N/A
Housing: N/A
Steps:
1. Equip a necklace equipment
2. Equip Faire Joi chest equipment
3. You will notice the necklace vanish even the Faire Joi don't have anything in the neck
*Add more steps if necessary

Connection Specs
- Type of internet connection/provider: N/A
- Modem maker/model number: N/A

■ PC Specs

To obtain the system information, open the FFXIV launcher and select Config → System Information → Display.

-=-=-=-=- System Information -=-=-=-=-

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Laptop Model Name: N/A
Laptop Model Number: N/A

Gamepad Manufacturer: N/A
Gamepad Model Name: N/A
Gamepad Part Number: N/A

Browser Information
- Name and version of the browser currently in-use: N/A
- Internet Explorer Version: N/A

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■ PS4 Specs

Model Number of the PlayStation®4 You Are Using
- Model Number: N/A

Model Number of the PlayStation®Vita You Are Using
- Model Number: N/A

Information About the Peripherals You Are Using
-Type: N/A
-Maker: N/A
-Model Number: N/A

Example:
Using the Faire Joi (there is nothing in the neck even if I'm using a necklace equipment)
http://i.imgur.com/73tiNFO.png

Without the Faire Joi
http://i.imgur.com/JOn1bkj.png