Skeleton Storm Mages bugged attack at max range

Storm skele mages when at max range from the target bug out and do no damage the animation hits the floor before the mob, has anyone else noticed this bug?

Just came to post this myself, I think they're technically able to cast just outside of what their actual range is resulting in this happening quite often - I think it is actually causing Skele Mages to do way less damage overall, as when you move command them close then force attack the damage difference seems extremely noticeable.

Up you go.