Light shaders not updating in solaris

[compso]

Describe the bug
When shaders are applied to a light any color changes in the shader do not have
any effect until the renderer is restarted.

To Reproduce

1. Load attached hip file in houdini
2. . Set Arnold as the current renderering the solaris viewport
3. Try to change the colors in the checker of the light shader.
4. Changes are not applied until the render is stoped and started again

Expected behavior
Changes should happen live without restarting

Used Software Versions

• Arnold: 7.4.3.1
• USD: 25.05
• Any 3rd-party app: Houdini 21.0.440

lightColor.zip

[autodesk-oss-arnold-bot]

Issue synced internally to ARNOLD-16859