ID 520423 - The sourceColorSpace parameter on UsdUvTexture node has no effect when previewing materials on the Hydra Viewer

Problem summary
The sourceColorSpace parameter on UsdUvTexture node from "auto" to "raw" does not have any effect in Katana 4.5 and 5.0.
 
Customer reported version
katana.4.5v3
 
Customer reported platform
centos7
 
Steps to reproduce
1) Open the attached Katana project.
2) Expand the scene graph.
3) In the Viewer tab, disable Basic Material (Display > Basic Material).
4) Look through the /root/world/cam/camera.
5) Set the frame to frame 2 on the timeline.
6) Set the frame to frame 3 on the timeline.
 
Expected behavior
The roughness texture displayed on the plane changes depending on the frame.
Frame 2 is using a "raw" sourceColorSpace parameter on the UsdUVTexture shader.
Frame 3 is using a "auto" sourceColorSpace parameter on the UsdUVTexture shader.
 
Actual behavior
Frame 2 and 3 display the same roughness on the plane.
 
Workaround
Unknown.
 
Reproduced by support
This bug has been reproduced in:
Katana 5.0v4 - Windows 10, CentOS 7.9
Katana 5.0v1 - Windows 10, CentOS 7.9
Katana 4.5v4 - Windows 10, CentOS 7.9
Katana 4.5v1 - Windows 10, CentOS 7.9
 
Earliest version tested
Katana 4.5v1 - The sourceColorSpace parameter on the UsdUVTexture shader did not exist before this version.