ID 557293 - Combining textures with Swizzling doesn't work as expected.

Problem summary
Combining textures with Swizzling doesn't work as expected.
 
Customer reported version
modo.16.1v8
 
Customer reported platform
windows10
 
Steps to reproduce
 
1) Open Modo and import 4 different texture images and name them for their desired effect, such as Dissolve, AO, Roughness and Metallic.

2) Select Add Layer > Image Map > New Image and give it a name of your choice such as Combine.

3) Set the Blend Mode to Add on the middle three textures.

 
4) Right-click the Combine and notice that the baked texture from the Combined item turns out grey.
 
Expected behaviour
The textures should be baked together in a single file.
 
Actual behaviour
The file comes out as grey.
 
Workaround
Unknown.
 
Reproduced by support
This bug has been reproduced in:
16.1v8 - Windows 10, macOS 13
15.0v1 - Windows 10, macOS 13
 
Earliest version tested
15.0v1 - This issue appears to be in all tested versions of the product.