Circular dependency issue when exporting to Babylon with KHR_materials_variants

Using this model: glTF-Sample-Models/2.0/MaterialsVariantsShoe at master · KhronosGroup/glTF-Sample-Models · GitHub
Circular dependency issue displayed in console for both gltf and glb file versions of the model when exporting to Babylon from the Sandbox.
Any idea why? I was going to start working on adding the KHR_materials_variants export when I ran into this issue.

Welcome aboard!

I think this one is for @bghgary.

Sorry for the slow response, but I will try to look at this soon. If anyone else wants to investigate, it will be helpful.