Fizz aa and W bug

In two games as fizz I had AA's not going off (or even starting) and W's that did no damage. This was a somewhat common thing to happen in fights. My friend also had trouble with his aa's a couple times on other champions (but this was three or four times with in six or so games). This bug is very unfortunate considering I found it in a ranked game and lost many close fights. I wish I had a recording but if you need more specific information please let me know!