The Ahk Aah Amphitheatre (Extreme) - Shiva disappears after Diamond Dust

Occasionally Shiva will disappear for the remaining part of the fight after she does Diamond Dust in phase 2.

Time: Thursday 30th October 2014, 2.45pm
Frequency: Occasionally
World name: Ragnarok (legacy server)
Character name: Selena Valariaux
NPC name: None
Monster name: Shiva (extreme)
Class/Level: level 50 Summoner
Party or solo: 8 man party
In-game time: 2.45pm
Area and coordinates: The Ahk Aah Amphitheatre (Extreme)
Steps:
1. Load game and login
2. Join The Ahk Aah Amphitheatre (Extreme) in Party Finder
3. After 'Diamond Dust' is cast she will disappear off the screen for me
4. Have to wait for the battle to restart to see her again

Connection Specs
- Virgin / optic broadband
- netgear

Model Number of the PlayStation®3 You Are Using
- Model Number: CECH-2003B

Please can others post their specs so hopefully this can get resolved... Many thanks.