Primordial Sinathia affix

I am using a primordial sinathias aspect, which should be giving me a whopping 190 curse damage, effectively one shotting equal level mobs (at level 37) but it is not giving me any noticeable increase of damage, compared to using a staff which is only giving 35 spell damage. Not sure why this is and unfortunately my character isnt at training dummys yet to showcase it there but i have attached a basic idea with some mobs. It seems as though maybe just the increased curse damage might be affecting it and not the flat.

Can confirm Sinathia’s Dying Breath reforged affix does NOT apply the flat spell damage to curses! TESTED:
Does NOT apply to Bone curse! Tested on the dummy, a white wand, whose flat spell damage from implicit actually applies, gives me roughly the same dmg as the T8 Sinathia affix (dmg is equaled by the % increased curse dmg from Sinathia’s which actually applies). Bone Curse Tootltip is affected by flat spell dmg from wand, spell dmg for curses from idols/helmet, but NOT from Sinathia’s. Please fix it ASAP, thank you!