Sejuani E bug (gameplay)

So ive been playing a lot of sejuani lately, trying to get used to her after her soft rework, and ive noticed a few times when my e went off, it hit them, it consumed the charges on them and im 99% sure it dealt the damage, but the stun didnt go off and/or didnt give me the damage proc from my passive. its happened once with the big chicken (stun but no passive dmg), 3 times now with bot lane scuttle crab (no stun or damage), and once with a champion (no stun or damage). so far it hasnt been a major disruption but its still a pretty significant thing, i would love if riot could get to the bottom of it