Items launched into wall facing North visually lose downward momentum

When building a item display wall, I noticed when I built the machine facing North, visually items would get stuck on the first block and shoot downwards once it actually reached the bottom. It can be seen a little more clearly when the wall is made of Honey Blocks. Other directions I tried work fine.

What I expected to happen was...:{*}{*}

The items slide down the wall regularly

What actually happened was...:

The items get stuck on every block before shooting down

Steps to Reproduce:
1. Create a machine that dispenses items into a wall, e.g. dropper into water stream into wall, facing North.

2. Fill the dispenser and run