Warwick's ultimate not suppressing properly.

I've played a ton of Warwick top recently (I really love it), but I've found that his ultimate doesn't suppress properly.

There have been many times when a Yasuo has been able to throw his knock-up Q after being ult'd, Thresh being able to use his Q/E while he's ult'd, etc. I've even had one instance of someone grabbing a Thresh lantern as I hit them with the ultimate. It's incredibly unreliable to use, and it's such an important part of his kit. =/ https://webmshare.com/Pr1LR

Not only that, but after using Q and holding it down, his auto attack animation stops for a brief moment before it begins again; he just kind of stands still and does nothing.