Zilean ult bugged

Hi!

Played a game of ARAM today (2015-02-20) as Zilean. Despite our Ashe defending the base the entire game we felt confident in our victory untill we made a vast discovery. Whenever Zilean (me) ulted an allie caught in the claws of the opposing team's Warwick, it wouldn't work. We tried this more than once, taking in consideration the bad timing, but the ult was still active when our allies died.

After a while, Amumu went from sobbing to hystericaly crying and so all hope was lost. Rito pls, grant us the comfort and rid this heartbreaking bug as soon as possible.

Also, Aatrox claimed his ult didn't work, but wouldn't share any details on the subject, so I'm just going to leave that here.

Best regards, Phnoflake