Mordekaiser W -> E interaction bug-

Hey. I'd just like to point this one out, since it's been bothering me for a while.

There is a strange interaction that happens every once in a while that effects Mordekaisers ability rotation when he uses his W before E-ing. It's rather weird, as it cancels the entire ability out.

What do I mean? Basicly, the W, the shield part of his kit that damages, has a proc ability appon finishing its duration or on activation. It creates an animation that shows the leech(Life steal) and the damage dealt when activated the second time. However; If you use your E (The cone damage thingy) instantly after you use your W proc, The ENTIRE process of his E, is canceled. It puts it on cooldown, and shows that you cast it. But the damage and the visuals that it shows when casted, doesn't appear (To clarify; mordekaiser does his hand movement to cast it, but nothing happens). Meaning you can't E someone for shield-regrowth in a fight, effectivly canceling the entire ability alltogether whilst freezing your character for a split second from the cast of E itself.

This is not a major thing, but it has gotten me killed numberous ammounts of times. I don't have any footage of this. And if someone can get some for me to try and proove it; that'd be apprechiated.

If it's just all in my head; or if i'm dead wrong, I'd like to know that aswell. Since you know, I don't know if it's a bug or just my brain playing a few tricks on me.