Fate event lag

Whenever I enter a FATE area and try to attack enemies my character does not move at all when I select an attack commando.After freezing on the screen for a moment I can finally see the combos, but the enemy is already dead.
Sometime all the enemies and everyone who is fighting are all invisible,at a result I can just run around which looks really ridiculous and not able to do anything. This happens every time I enter FATE Event in Coerthas.

It's pretty annoying to have this issue only during FATE scenarios.And most of the time I can't participate and control my character fluently on my ps3.