Aatrox Bug

I know I know, "Aatrox post?" but I got mcfukt by a bug I had to take a second look at, and am happy the enemy Aatrox had around the same reaction as me when it happened.

https://www.youtube.com/watch?v=W1O1K7ZrFRc

What happened is I think my Mini-stun/Knockup "stopped" his Knockup but didn't at the same time, Aatrox didn't reach his destination on his Q but the explosion for the knockup went off either way.