Beckhen reduces “4th skill” chance of Windblade?

by JunNu posted Oct 19, 2018
So Windblade 4th skill is throwing the “Ancient Dagger” which I can say activate for 8 out of 10 times. (Most of the time basically. Maybe Windblade user would notice this). But when facing Beckhen specifically, my Windblade only activate that chance ONCE out of many fights. So does Beckhen has hidden passive like that since we all know he’s buffed in FC.