So this was whack man. At first I was just ticked off that the second part of her ult stunned me even though I parried the first part, although I don't think that's a bug (as much as I think it should be).
What IS indisputably a bug is the fact the Qiyana ignited me while stunned... both of us are just sitting there not moving and then I catch on fire.
Just think if I hadn't AA that minion I could've got her.
Second video is of me Qing while stunned be her ult.
Before you say "you started Qing before the stun hit you"
No, no I didn't, I paused the video and you can clearly see that I'm stunned and there's no -40 mana message. Then I take a step forward of just walking while stunned and then proceed to Q while still stunned. I pause the video again so you can see my mana cost.