QuoteMain problem there is that moves with startup invincibility wouldn't get nulled anyway.Won't get nulled just for the invincibility time, but will be nulled when the invicibility is over.
And that's pretty much the problem, sounds a lot like a bug. The enemy is actually being hit, not cursed.
Leona bomb can make shiki a more interesting character, if it can be used to set up some combos, just punish it with damage dampening.