[Gameplay] Garen cannot fluently attack Nexus while active his Q

As the title stated, it happened every time.

For example, you played Garen and left click to attack enemy Nexus, he will do as normal but suddenly paused if you try to use AQ to reset the auto-attack timer. It work well against others like units, turret and inhibitor but Nexus.

Even though Garen is active his Q before and run to attack Nexus, he will stop before the nexus and wait for about 2 seconds then jump attack.

If you right-click the Nexus many times he will attack after, but this is so annoying in the game play.

It happened as early started the Garen's visual update. I don't think this is designed to be, please solve it, Thanks.