Vi Q bug

I have been a vi main pretty much since she came out. she never lets me down. But lately she has been letting down my team in very important times, whether it is just instant casting her q to dash over a wall fail, or fail a very important gank because my q decides to instantly release 10 feet away from the enemy champion.

So if u haven't figured it out, Im having problems with the Q ability releasing instantly if facing certain ways.