(GAMEPLAY) When you ult as Yasuo you sometimes end up in fountain if target was close

To my knowledge you don't have a good way of knowing exactly where you will show up when you ult as Yasuo. When I ulted in a custom game I ended up in fountain even though the target was not that close to (550 units?) from fountain. it was a single target (trundle) and I ended up being teleported to the far side of him and immediately died.