I though this was fixed after 2.2 and have been dealing with it for a long time. There are two bugs which occur with the Heavy Knights special. The more common one is where the Heavy Knight attempts to swing but gets stuck. From doing so, he is only able to attack someone in front, not a 360 degree spin. The second bug which is much less common is when it plays the animation but doesn't do anything. That also doesn't count itself as a special meaning that after it plays that animation, you may redo the special. Has this been noticed?