Upon teleporting, using a projectile ability won't appear at mouse pointer direction

Scenario:

Urgot uses summoner spell teleport to ward and upon successful teleportation, Urgot hits quickcasted 'R' to activate his ultimate. The projectile for his ultimate will fly at the direction that Urgot is facing rather than where the mouse is pointing.

Expected behavior: Urgot's ultimate should fly at the mouse pointer's direction regardless of what position Urgot is facing.

I have had many occasions where the Urgot ultimate shoots out the opposite direction from where my mouse is pointing.