ID 371451 - [Not a bug] Outlined edges appear randomly or are missing on surfaces when using a Cel Edges Material

Closed with the resolution: Not a bug.
Issue reported below is referring to the Segment Edges setting of the Cel Edge Material. This setting is not intended to follow the topology of an object and after review, is behaving as intended.

Problem summary
Outlined edges appear randomly or are missing on surfaces when using a Cel Edges Material. This issue emerges when using the "Segment Edges" option to outline edges on surfaces. 

Customer reported version
Modo 12.1v2 

Customer reported platform
10.13

Steps to reproduce

1) Create a sphere, select it and then assign a material by pressing "M". 

2) Go to the Shading tab. In the newly created material, open Add Layer and create a Cel Edges Material and a Cel Material under Custom Materials.

3) Start the Preview Render by pressing "F8". Navigate the scene camera to look at the sphere.

4) Compare the Cel rendered sphere with the sphere's wireframe. The outlined edges in the Preview Render look incorrect compared to the sphere's wireframe. 

Workaround
Unknown. 

Reproduced by support

This bug has been reproduced in:
Modo 12.1v2 - MacOSX 11.13 - Windows 10 - CentOS 7

Modo 12.0v1 - MacOSX 11.13

Modo 11.2v3 - MacOSX 11.13

Modo 10.0v3 - MacOSX 11.13

Modo 10.2v4 - MacOSX 11.13 - Windows 10 - CentOS 7

Earliest version tested

Modo 10.2v4 - The issue appears to be in all versions of the product. 

Expected behaviour
Edges that are outlined by using a Cel Edges material should not appear randomly or be missing on surfaces. 

Actual behaviour

Edges appear randomly or are missing when outlined using a Cel Edges material.