No, I think this is before the patch. I've actually been having probs with my main as well (Vladimir.)
I actually just got out of a match with a similar problem. I zhonia'd, & although I may not have made it, it bothered me further (since it wasn't like the 7th time something hadn't gone off with Vlad) since after Zhonias, I used "W," and . . . .
. . . . . . .
Nothing!
Then I get stunned, & die. There was also a similar instance, where I Zhonia'd, & it didn't activate, so I quickly used "W," & then I heard Zhonia, as I had done Sanquine pool, & like always, you are immobile while in zhonias, so my pool was stuck, & Blitz, & Diana were able to kill me with like no health, because after pool ended, I didn't rise out of the ground, because of a delay, & when I did, I couldn't move. I typed in all chat "wtf? Diana, did you see that? that was bull, but okay." and she replied: "Yeah what happened?" I told her I was going to kill them both with "E" when I came up, but it bugged out. also instances were I almost died because of something not going off, usually q, or e, & I've had to spam "E" just to kill the enemy, or "Q" just to get the health from a minion, or enemy to survive a dive. Will these bugs get noticed? I honestly don't know. To them it may just depend on how often it happens, or how game breaking it is. Otherwise, suffer pretty much.