Painted Vertex Color on Meshes in BPs do not save when Movie is generated from Matinee

When you render out a movie from a Matinee, the painted Vertex Colors on a Blueprint does not render, the meshes in the Blueprint revert to imported vertex color.

Also Reproduced in 4.8.0 and Main Promotable-CL-2581018

Screenshot from Editor:
[Image Removed]

Screenshot from Rendered Matinee:
[Image Removed]

Quick Repro open the VertexColorMatinee Project attached above

1. Create a new Blank Project with No Starter Content
2. Import the attached Cube_PaintedVerts.fbx
3. Create a New Actor Blueprint
4. In the new Actor Blueprint, add the Cube_Painted Mesh
5. Place the new BP in the level
6. Vertex Paint the BP white in the level
7. Create a new Unlit Material containing only vertex color in Emissive Color
8. Assign the new Material to the imported Mesh
9. Create a Matinee with a camera facing the Blueprint in the level
10. Create a movie from the Matinee

RESULTS: In Editor Vertex Color painting is not rendered in Movie

EXPECTED: In Editor Vertex Color painting is rendered in Movie

Error code R-1618

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