Sometimes mobs cancel effect of my flasks? how?

Is there any mod for atlas/map/mob wich can cancel my flask effect?

I m actually playing with Zerhpi's healing on using skills, so when it happened .. it always been a "big" surprise for me.
For example now I almost died to it. Char is 94 lvl, so i m not so new in this game. Only bloodlines mod was applied to map.
Please, help me understand , why flask effect ends?

PS. I died and now can read monsters properties:

Name: Nullifier . Purezeal
Extra Fire. Gain Frenzy, Dodges attacks and spells, resist chaos, elemental dmg, Evasive. Have orange contour.

'nullifier' is a mod that removes flask effects on hit.