Anivia Q Hitbox Detection

Hey guys, I've been playing Anivia a lot recently and I've noticed her Q (Flash Frost) hitbox is SUPER wonky. It's a lot smaller than the particle effects would make it seem, and even if you get a champion with it, sometimes it doesn't stun them. I've confirmed this with a lot of other Anivia players, so it's not just me being bad. It's especially prevalent in her Blackfrost Anivia skin. And upon reactivation, sometimes the stun doesn't go off or the target isn't chilled. Maybe it's because Anivia is quite old and her scripting is off, but I'd really like some feedback on this.