If I drop Aerial Assault then move using either WASD or cursor with wasd disabled, then it moves the attack to where my character is facing. This is a huge bug for falconer build 
Here’s a video of the bug https://www.youtube.com/watch?v=t_4Pxvu36uQ
I have this same issue with using click to move; I’ll use Aerial Assault and dash to avoid mechanics often and the falcon, after having moved to where I originally pointed him to featherstorm, will just completely be off base at the start of the animation. This makes the build feel very jarring to play, especially since the build does damage in bursts/around CDs.