ID 379257 - Closing a scene that has a "UV Fit" Operator with the "Keep Proportion" option enabled, results in the UV map of a procedural mesh to be stretched when opening the scene

​​​Problem summary
Closing a scene that has a "UV Fit" Operator with the "Keep Proportion" option enabled, results in the UV map of a procedural mesh to be stretched when opening the scene. The UV Map is always stretched despite if the "Keep Proportion" option is disabled and then enabled after opening the scene. 

Customer reported version
Modo 12.2v1 

Customer reported platform
MacOSX 10.14 

Steps to reproduce

1) Open Modo and go the Mesh Ops tab.

2) Click on "Add Operator" and add a procedural sphere. In the Sphere's Properties, disable the "Make UVs" option.

3) Add a "Create UV Map" Operator. Go to the Create UV Map Properties tab and change the Projection Type option to "Atlas".

4) Add a "UV Fit" Operator. Go to the UV Fit Properties tab and leave the "Keep Proportion" option enabled. 

5) Open the UV Texture View and select the sphere's UV Map. The UV map is now centred and proportional to the UV grid.

6) Close the scene and then open it. The UV map is no longer proportional to the UV grid and if the "Keep Proportion" option is disabled and then enabled, the UV map is always stretched. 

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Workaround
Delete the current "UV Fit" Operator each time the scene is reopened and create a new operator to keep the UV Map proportional. 

Reproduced by support

This bug has been reproduced in:
Modo 12.2v1 - Windows 10 - CentOS 7 - MacOSX 10.13  

Earliest version tested
Modo 12.2v1 - This feature did not exist before this version.

Expected behaviour
The "UV Fit" Operator should always keep the UV Map proportional, if the "Keep Proportion" option is enabled when reopening a scene. 

Actual behaviour
Closing a scene that has a "UV Fit" Operator to make a procedural UV map proportional, the UV map is always stretched each time the scene is reopened.