Time: 1620-1635
Frequency: Duration of boss battle
World Name: Gilgamesh
Character Name: Rarayouni Nanayouni
Monster Name: Lady Amandine
Class/Level: Black Mage level 31
Party or solo: Party
In-game Time: unsure
Area and Coordinates: Haukke Manor Boss Room (coordinates unknown)
Steps:

1. Party approached boss to fight her
2. Party fought boss until the last set of monsters spawned in the room
3. I attempted to use my Limit Break
4. Although it was showing the button being pressed, no limit break was being cast (this includes no circle appearing for aiming purposes)
5. Multiple attempts to use the limit break yielded the same results

Connection specs:

Internet Provider: Virgin Media
Modem Maker: Virgin Media

Model No of PS3: 02-27430370-2904753-CECH603