Mordekaiser´s ultimate creates an uncontrollable azir

Since I have started playing mordekaiser I played vs azir twice and both times when I killed him and got the soul servant of him I was not able to make him move or make him attack with the alt key. I think he did follow me around.

unfortunately Azir is currently not available as bot so I was not able to test it out again.

Hope this information helps in any way.