[GAMEPLAY] Heimerdinger: Ult Turret stops attacking

This just happened again. If you are able to look at my game play at (11-18-2016 3:57 MST). Please do so.

I was doing a 1v1 with Olaf, I had my Ult Turret up. It was attacking Olaf for a bit, and then next thing you know, it was just standing there (even though Olaf was still in range).

This happened several other times where I would be fighting someone with my Ult turret, however, after I die, ult turret stops attacking the guy I was fighting. And sometimes, instead it stops attacking the guy I was fighting and starts attacking minions if they are near.