Diffuse Transmission and switching the IBL

[echadwick-artist]

mandarin-orange.zip

1. Download and unzip the GLB
2. Drag and drop into https://gltf.ux3d.io/
3. Switch to any of the other IBLs.
   Result: render turns red. Switching back to Courtyard doesn't fix it, must reload the page instead.

Before, and after switching the IBL:

[echadwick-artist]

Also occurs in https://github.khronos.org/glTF-Sample-Viewer-Release/