[GAMEPLAY] Alistar's Headbutt may not always be interrupting Zac's Elastic Slingshot as intended

I was playing a bot game as Zac to get my first win of the day and the enemy Alistar showed me something I've never seen before. As I was chasing down the enemy, I hit my E to slingshot in, but Alistar Bot being a bot managed to headbutt me as soon as I pressed the button. But rather than interrupting and cancelling me as I would have expected, he actually knocked me to a new location where I was facing the opposite direction and my slingshot started winding up then, but facing the other way. Equally inconvenient for what I wanted and probly so rare and unimportant an occurance, it may not warrant much efforting fixing it if it is a bug, but it was quite interesting to see.