On the capture point of Nepal Sanctum there seems to be an invisible wall/pillar that will stop projectiles. This only occurs when facing one particular way (with the stairs/walkway on your right side.
If you are aiming towards the right exit of enemy spawn, somewhat aligned with the outside rim of the circle that is on the ground on the point, you will hit an invisible wall. This happens with projectile and hitscan heroes. However it can be shot through from the other side.
I also have video of the particular spot if needed!