Kennen- W (active) bug

I created another bigger thread on Kennen about a quality of life/feel change in the Gameplay/Balance board ,and also included what I think is a bug. I am not reposting my entire thread but instead reposting the bug portion here on the Report A Bug board.

The possible bug: Darius, no matter if you Flash or seem to be outside of his grab range, he will grab you under visually impossible scenarios. As Kennen, I have had issues with casting W while an enemy Champion was the only one in range with a Mark but quickly moves out of range during my cast. Kennen give's his little shout, the spell goes on cooldown, but no effect from his W. If Darius can have impossible ranges to grab people, why can't Kennen get his casts off when the ability indicates someone is in range to do so?

How to recreate:

• Be Kennen
• Apply a Mark of the Storm on enemy (not from activating W)
• Have enemy champion in range for your W to un-gray itself and be considered usable.
• Activate W with enemy on the edge of the AOE but moving slightly out of range while casting
• Kennen give's his shout, spell goes on CD, but no actual effect from spell

The below link will take you to my original thread further explaining his "pauses" and how these pauses can ruin your spell chaining. Kennen QoL/QoF and possible w active bug thread