Mobs shoot projectiles at an offset that prevents them from hitting targets above them

Mobs seem to be not able to shoot directly up or down and projectiles seem to spawn a little bit too forward(at least 3 pixles) from the source

 

I tried using addons to see if it was a bug or not, I tried increasing the accuracy of arrows and the ranged fov of the shooter mob and confirmed it as a bug as none of the two fixed it