(GamePlay) Darius auto attack wont work.

Okay so I've been playing in the new game mode and while playing Dunkmaster Darius skin on Hexakill. I have noticed that my mouse courser gets stuck from time to time. now the bad part is that then I cant auto while its stuck. so far all I can tell is that it will get stuck when ever im about to attack someone that becomes untargetable. (ex. zhyona's hourglass, died faster than I could get a chance to land an attack.) but I have found a way to get out of this bug. I simply right click on my mouse to refresh the courser. however it gets really annoying to have to constently do this especially during the middle of a fight.

I would have a screen shot of this but every time I try to use the prtsc button all I get is a black image.