Eternal torment not working

eternal torment not working.
So eternal torment skill says “Your curses cost 50% less Essence and last forever.”
It is last until you are in the same screen with the monster. Forever mean even if i left the game the curse should be still effective . I wanted to combine this skill with the item which provide me damage reduction up to 20 for every cursed foe on the field … but not working because the curse do not last after you are little bit away from the monster.

“Last Forever” means there is no time constraint and they will not expire over time.

However, in order to reduce server lag, the curse will be removed if you are a certain distance from the enemy because it is presumed that you no longer need the curse on that enemy.

Absolutely not.

You leave the game return and everything resets.

The skill works entirely as expected.