Malzahar's Ultimate bug... [GAMEPLAY]

Indeed. I also main Malzahar and while playing U.R.F mode of April 2015, I have noticed that he has a bug with his Ultimate. While I was chasing a champion, I grasp at the opportunity to Ultimate on the champion I was chasing, but only to find out that when I ulti that champ; and it runs into a bush and I ulti that champ just about 0.5 sec before he enters that bush: i was able to stun that champ while it disappeared into that bush, with about half or sometimes 1/3 of its life. But all you see is Malzahar and his ulti going towards a bush but no visual on the champion that is being Ulti. So it does stun the Champ but when his ulti is done. The champion that was targeted, now is free to either attack me or continue to run away with no damage done at all to it. Those champions that I target, should have been killed by malzahar's ultimate. This happened to me about three times during an URF Mode game. So please Rito, do check into Malzahar's Ultimate and maybe also check into its voidlings. There were a few times that I started attacking a minion or champ while having my voidling summoned and it took way longer that it should to start attacking the same champ/minion I was attacking. As I play more games and I happened to repeat that same bug with its ultimate, I will try to screen shoot it and post it here if possible. We hope to hear some response from Rito about our concerns.