Darius W bug - can't move

When playing Darius and attack an enemy with your W, and they dash/flash away instantly or in a small time window, darius is frozen in place and cannot move, even with movement commands being spam clicked.

E.g. Im Darius fighting khazix. im hitting him, and i use my W in the same second that he uses his jump to get away, darius will freeze in position for around a full second, unable to move. I've had this happen since last patch too but i thought it was just me not clicking enough. Now that there are lots of khazix and other jump champions its happened around 5 times this patch. hard to reproduce, but it does exist. I would make a video but i have a bad computer.