DAZ Genesis 8 - Problems with fingers

I could succesfully import a DAZ Genesis 8 figure into Unreal. The retargeting also worked very good so that I can use now all animations for the EPIC skeleton. But I noticed a big probem with the fingers. They don´t work. They stay always in one fixed position. Is there a fix available? It would be a pity when this problem cannot be solved…

Best regards, Andreas