Character freezing in Dynamis when fighting multiple enemies.

Platform: Windows
ISP: Virgin Media & BT
Type of Internet Connection: Fibre Optic
Internet Connection Speed: 100MB
Date & Time: 22/05/2016 12:30
Frequency: Twice
Character Name: Gingerninja
Race: Tarutaru
World: Leviathan
Main Job: Thief, Lv.99
Support Job: Dancer
Area and Coordinates: Dynamis San D'oria, Dynamis Jeuno
Party or Solo: Solo with 2 Trusts.
NPC Name: None
Monster Name: None
Steps:

• First time, farming currency in Dynamis - Jeuno, pulled around 5-6 enemies, my character completely froze, wouldn't let me move at all to attack other enemies, until I died.
• Second time, in Dynamis San D'Oria, same happened again, pulled enmity from 4-5 other enemies when killing Time Extension enemies and the same happened again, character completely froze until I died.