Vel'Koz's Q premature detonation.

Recently played a match against a Vel'Koz as Vlad, usually I block his Q with minions, but when there's none I sidestep then move towards him. After dodging the skill, it would prematurely detonate next to me. At first, I thought maybe the range marker was mis-representing it's range, but after trying to dodge at half it's max range, it would still detonate. Maybe the hitbox is off, or the Q is bugged to detonate next to enemy for guaranteed hit.