Shaco ult bug

I have experienced in multiple ranked games where while playing Shaco I will randomly lose the ability to control my clone. I always use the R key to move and tell him to attack and sometimes the clone either does not listen to the command or it will be standing still and I can't make it do anything. It can be extremely frustrating into fights to try to control two things at one and have one not working.

P.S. I think a nice quality of life buff would be giving the clone the same ability to follow enemies through fog of war just as Annies Tibber just received.