GF block is broken.

meitran

Having problems with my character not blocking attacks. I press and hold "shift" as always, but after a few secounds my character lowers the shield and i take damage. This occures with a full guard meter, on all type of mobs. It have only been this way after the last patch.

This make it impossible to tank due to problems with keeping agro (mark get aborted) and me taking heavy damage.