[Gameplay] Illaoi Q (Tentacle Smash) follows through during knockback Possible Bug

When Illaoi uses her Q to smash the ground in the direction she desires, if she is knocked back in any direction, the Tentacle Smash will still occur and follow Illaoi smashing into the ground in the same direction that Illaoi already cast it.

1. Use Tentacle Smash (Q)
2. Gets knocked back
3. Tentacle smashes the ground after following Illaoi in the same direction as it was cast

I played a game against an Illaoi as Alistar and everytime I tried to knock back Illaoi with Head Charge (W) to stop this cast, the move would still be cast and I would still get hit. I'm not sure if this is working as intended, if the knockback should stop the cast because it is being cast and technically her idol is being removed from the ground, or if she should be the only thing knocked back yet the tentacle stays where it was originally cast from.