Ultimatum Boss Arena Flask Bug

Hi,

i notice problem with Ultimatum Boss Area. I got 5 utility flask with enchant "Used When Charges Reach Full" and Explit "Gain 3 Charges When You Are Hit by an Enemy".

When i fight with Trialmaster i got flask charges per hit but enchant doesn't work. I need activate flask manualy.

I finished over 100 maps with this boss (form scarab) and all time flask doesn't work in the boss Arena. Only got charges to max and nothing hapenned.

Plz fix.