I've been getting this really strange delay when I'm in a dungeon and when I'm farming.

During dungeons everything is freezes for a few seconds, I can't see what my teammates are doing/or who needs heals. The delay last for a few seconds where the screen is frozen (none of the players/or monsters are moving). I don't know what's causing this delay but it's getting very hard for me to join dungeons....

Also happens when I'm farming, I can't see the monster's HP for a few secs (the screen freezes and a few seconds later I see the monster's HP and attacking me)

I'm playing the PS3 version and this has been going on since yesterday (before and after the maintenance). Can someone please tell how I could fix this? I don't think it's my internet connection, it says my connection is Excellent.