Spooky Ghosts bug

I was playing Janna last game, and was able to use spooky ghosts over a wall.

Our team had just taken dragon, and the other team was on the other side of the dragon pit wall. I move up to the wall to cast W for the slow (Vi was getting ready to Q over the wall), and then accidentally used spooky ghosts after W. One of the spooky ghosts appeared on the other side of the wall while the other one had to walk around. Not sure if this is an intentional interaction but I'm pretty sure it's not.