warwick freezing enemy team.

Hello,

I noticed that at certain points Warwick freezes certain champions around him momentarily. This has happened twice in my games already.

In this first one (http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2410997657/33118667?tab=overview), I got first blooded because I literally could not move. This occurs at 3:10ish.

In this second game (http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2415420473/33118667?tab=overview), the bug is much more visible, as my entire team, including the enemy Nautilus, froze while kiting back from Warwick at one point, which caused us to lose the game. This occurs at 24:00ish right before they get baron.

I'm not sure how to upload the replays for these two matches but if someone could look into this bug, it'd be much appreciated.

(edit - webm posted below of 2nd game)