Apex Cloth will not render correctly with cloth assigned to multiple materials

Apex cloth material assigned to multiple material elements will not render correctly in Persona or when PIE/Simulate in the editor. Any material element other than element 0 will be masked/invisible when used.

This is a regression from 4.7 where the feature worked without issue, using the same test assets provided with this ticket.

See attached images for reference.

1. Import attached Cloth asset (or make your own with multiple materials in Max/Maya)
2. Open the Mesh
3. Apply the APK/APX cloth file
4. Assign the cloth file to each submeshes correct index. (material 1 = Submesh 0, Material 2 = submesh 1, etc)
5. Place in level
6. Simulate/PIE

Results: When looking at the mesh in persona or when in PIE/simulate the submesh materials will be masked.

Expected: The submesh materials should work like the first material that the cloth file is assigned to.