ID 484715 - scene.removeItems removes all references on a texture from other items.

Problem summary
scene.removeItems removes all references on a texture from other items.
Customer reported version
modo.15.1v1
Customer reported platform
windows10
Steps to reproduce
1) Download and open the attached scene file in Modo. 
2) Select the item from the Shader Tree in the attached screenshot.
3) Run the attached script.
4) Notice that the referenced textures have been removed on the other items aswell.
Expected behaviour
The textures referenced on other items should be unaffected. 
Actual behaviour
The textures referenced on other items have been removed.
Workaround
Unknown.
Reproduced by support
This bug has been reproduced in:
15.1v1 - Windows 10
15.0v1 - Windows 10
14.2v1 - Windows 10
14.2v1 - Windows 10 -regression
14.1v3 - Windows 10

Unable to reproduce bug in:
14.1v2 - Windows 10
Earliest version tested
14.1v2 - This issue doesn't appear in this version and has regressed