Pharos Sirius Lag

[Curagaja]

Has anyone else experience extreme lag on the final boss of Pharos Sirius? The lag I experience is pictures on my macro bar not showing, 5s or longer to open the start menu, my character holding one pose no matter what I do, the final boss herself disappearing for the entirety of the fight, and newly acquired status effects such as buffs and debuffs not showing up for 3s or longer.
I don't experience any sort of lag anywhere else in the game.

I am a PS3 player.