Genji projectiles not traveling when firing in hero mastery

In Genji’s hero mastery course, when I primary fire, Genji’s projectiles launches but stays in place. The SFX and projectiles even appear but it doesn’t travel and disappears after 2-3 seconds.

The only repro step I can find is:

  1. Load into Genji hero mastery course
  2. Spam primary fire in the loading screen before you spawn into the course