Assassin's mark ignores curse limit

Hello there!
Found that problem when added anointment "whispers of doom" on my amulet
Basically i have despair on hit on my gloves, punishment as an aura that comes from blasphemy and assassins mark from shaper ring.
So, im playing occultist and have additional curse that comes from Malediction lab point in tree and annoint from amulet so i should have 3 curses active on 1 enemy.

Funny thing here, that when i add despair as aura to existed punishment in link, all works. When i turn off punishment aura and i have despair on hit on my gloves, both assassins mark and despair are working togethter.

All 3 curses have "curse tag" and assassins mark have both "mark" and "curse" tags, so i have no clue whats wrong here
shaper ring mod says "trigger level 12 assassins mark when you hit a rare or unique enemy and have no mark" and both punishment and despair dont have "mark" tag in their description.
I think that there is some bad interaction with "on hit" mechamic here
And I assume that its something that called as a bug.

Are you making sure you have enough mana to cast the triggered Assassin's Mark?

u right, feeling 2head lol
had 2 mana free