[GAMEPLAY] Vi and Lee Sin ult interaction

The bug is where Lee Sin ult kicks Vi during Vi's ult, causing Vi to be kicked backwards but still continue her ult animation and effects at a large distance.

During this bug, I was playing Vi and ulted lee sin, who was standing in tri-bush about exactly where my crude dots are. http://i.imgur.com/d4vJwJR.png I was standing in river when I (Vi) actually activated the ult.

When I got close to Lee Sin during my ult, I assume he targeted me (Vi) with his ult. Lee Sin kicked me away during the Vi ult and it caused me to move a large distance away (Vi is supposed to be unstoppable) but Vi continued to do the ult animation and effects. Lee Sin was knocked up and slammed down, and Vi did her normal knock up and slam down animation, but they were a good ~800 or so units of distance apart, essentially knocking me back to exactly where i casted my ult from. (I'm taking a guess at how many units, but it is probably however many units away lee sin's ult knocks people back.)

I know this shouldn't have happened as vi is unstoppable during her ult animation; making this is quite a grade A case of spaghetti code.

I don't actually care to attempt to replicate the bug, nor do I have a replay, but here is the game where it happened. http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2169747923/39320844

Sidenote: I don't actually recollect if I took damage from the ult, or if his ult technically went on CD, or any other minor detail. The only thing I know is that I was blown a distance back and the Vi ult animation continued like normal but at a large distance.