Slight inconsistent outer wall alignment using Cura 5.2.1 and an Ultimaker S5. Pics of issue as well as settings in comments

[Jhawk6553 8]

Printing with an Ultimaker S5 using Cura 5.2.1.

The issue

Misaligned outer walls when printing a straight outer wall on a lithophane. At first I thought that the issue was a mechanical one. So I tightened the belts, cleaned the Z axis rod and re-lubricated it, re-lubricated all of the linear rods, cleaned the print head, got a new print core, dried my filament, cleaned out my extruder and re-lubricated it. However none of these solved this issue. The white sections of the lithophane are nominally 1mm.

 

Now I am pretty certain that the issue is actually Cura related. After slicing, I just happened to zoom in to a random spot in the white area and looked at it from a upward angle and this is what I saw:

From other angles, this misalignment is not visible. I am starting to believe this is the issue. Here are my settings. Please let me know if anyone has any theories or have any questions regarding my settings.