While strafing? The hungering arrow only fires if there’s a target. If you strafe in place with nothing around, it’ll only fire the strafe projectiles.
Plus due to the speed that you have while strafing (a full momentum stacks), the hungering arrow is very difficult to see. But it’s there.
When you look at one of your GoD set pieces, are all 3 effects lit up in green (the 2, 4 and 6 bonuses)?