[Gameplay] Azir 'E' ability active upon respawn on Howling Abyss

Unfortunately I don't have any visual evidence, but the bug seems fairly easy to reproduce. I can't recall if it's happened every game when I play Azir, (as it is randomized, so each case is somewhere between 10-30 games apart), but there appears to be a bug with Azir's 'E' ability.

In the Howling Abyss, at the start of the game (or occasionally upon respawning,) his 'E' icon will be highlighted as if cast-able. This is with no soldiers active, and it goes away after a soldier is spawned and despawned. Using the ability does nothing but cancel Azir's current animation as if to start the animation for the ability, but then immediately cancels and returns to standing animation. The mana cost text that floats above the champion shows that I am spending mana to cast the ability, but no mana is deducted, and no cooldown is enacted. Since there is no cooldown, this can be done dozens of times consecutively, causing the animation cancel and mana text, but still not doing anything.

This bug doesn't cause any sort of game-breaking issue, but it clearly wasn't meant to exist. I figured if it hasn't been brought to riot's attention it should be.

Thanks rito!