Mordekaiser Q + Rapid Fire Cannon bug

Noticed a bug in Mordekaiser's kit involving Rapid Fire Cannon's extended aa range passive.

If a Mordekaiser player has the extended auto attack range ready on their next basic attack (100 energized stacks) from rapid fire cannon and then activates their Q and auto attacks a unit the bug occurs. Instead of auto attacking at the extended range and dealing basic attack damage as well as the additional Q damage as it should, it seems only the damage from the rapid fire cannon proc is dealt to the target. It seems that Mordekaiser cannot auto attack at the extended range when his Q is active. When this happens, Mordekaiser does not consume one of his three empowered auto attacks from his Q and continues to auto attack and use his Q as per normal once the extended range is no longer available.

I noticed this bug Yesterday and went into a custom game to ensure it was not just a one-off glitch. It continued to occur. From testing in the custom game I noticed that the bug occurs when attacking minions, champions, monsters and towers.

I hope this helps.