Life and Mana flasks not filling

It seams sometimes flasks stop gaining charges, gains slowly and never goes above 20 or so charges. One time when it happened I stopped using flasks and was relaying on regen to check will they refill, the flasks never refilled for most of the map until I got surrounded by mob's and died, then it started to refill normally. Sometimes it feels that opposite happens and you constantly have full or almost full charges.

Few times even noticed that without using flasks during whole map I get empty flash that never refills, seams that some charges just get removed.

This happened to me and few friends, for few times now and restarting client or resetting instance or dying seams to fixes it.

Normal tier flask newer gets this issue, I think Magic tier flasks with specific crafts are effected.

I have this issue with merc and witch,,,life flask stops refilling even when killing enemies. does not even refill when life flask has 24% chance to gain charge when enemy killed....really sucky when playing blood mage and energy shield