Aatrox W bug [patch 6.4]

So, after finishing stacking devourer (or buying Ravenous Hydra on top of it), I noticed a huge bug with Aatrox W. Sometimes it just doesnt work or display animation, sometimes it is completely fine. I finished stacking devourer at ~15:50 I bought Hydra at 17:40 Here is replay of this game (paste this in console while LoL Client is opened). If you lock camera at Aatrox, you will notice this too: powershell clear;if(Get-Process "LolClient" -ErrorAction SilentlyContinue){$ErrorActionPreference="Stop";$c=New-Object Net.Sockets.TcpClient;$c.Connect("127.0.0.1",8393);$c.GetStream().write((16,0,0,0,1,0,0,0,0,0,0,0,70,0,0,0,114,101,112,108,97,121,32,114,101,112,108,97,121,46,103,103,58,56,48,56,48,32,73,72,52,86,79,122,74,88,52,112,68,78,99,82,103,79,51,98,66,85,48,111,56,100,71,73,72,120,87,111,54,99,32,50,53,53,51,50,49,49,51,49,51,32,69,85,87,49),0,86);Exit;}"Error. Please make sure your LoL client is running.";