Thanks for the answer, although I ve checked thourully Crystals and Quests for the last hit group. I use only 1x 9 man group.
Or else maybe I am too unlucky! I will continue monitoring and killing the boss, I will post again if anything or nothing changes in the next few days!
Thanks again.
P.S. I get the message Crystal is failed to absorb soul at this time. So I have 9/9 fails. If more than 1 Soul Crystal in inventory you get no message at all!
Did this on Tyranossaurus (Primeval Isle for Stage 11/12 upgrade).