[Gameplay] SIONS ULT NOT WORKING

Between the Quinn vault bug and Sion's ult bug it's getting hard to rank up :(

Anyways basically i ult and like the title says make right angles.....

I went to ult vi down mid lane and then whoop Sion decided to make 90 degree turn up river. Also this has happened to me about 5 times so far...

https://www.youtube.com/watch?v=6c7w7jYgAO8&feature=youtu.be