Ultimatum boss area disable flask enchantments or what?

Hey everyone, i have question as i meantioned in title - is it bug that in ultimatum boss area flasks enchantment "reuse at the end of flask effect" doesnt work? and i have to use it myself. Guy from ggg support redirect me on this topic on forum to ask here :)

I have similar probleem on ''Use when flask is full'' when im phased againt the trialmaster boss...