Isometric sort order not working when moving horizontally using the tricks I found in the forum

I found the code from the community reps to get your camera to care about zorder as follows

Code (CSharp):

1. var camera = GetComponent<Camera>();
2.     camera.transparencySortMode = TransparencySortMode.CustomAxis;
3.     camera.transparencySortAxis = new Vector3(0.0f, 1.0f, zNumber);
4.  
5. #if UNITY_EDITOR
6.     foreach (SceneView sv in SceneView.sceneViews)
7.     {
8.       sv.camera.transparencySortMode = TransparencySortMode.CustomAxis;
9.       sv.camera.transparencySortAxis = new Vector3(0.0f, 1.0f, zNumber);
10.     }

Attached are images showing the problem. I am able to move my character along the bottom front side of the wall just fine (picture 1). However there is a spot on the back side where the character is behind the wall in reality, but the draw order has him in front of the wall(picture 2). If i move him a little further down the back side of the wall he gets fixed (picture 3)
Thoughts?
Don't mine the collider offset, I fixed this and its unrelated




The setup is an Unity isometric tilemap set to use z and some tiles and a character sprite renderer combined with the above code to force the sort order to be iso friendly.