In the Material Editor in UE4 selecting the Primitive Type under Thumbnail in the Details View does not update the preview material. There is no visible change or detail change that can be seen when selecting TPT Cube, Plane, Sphere, or Cylinder. The Thumbnail also doesn't update in the Content Browser. Update doesn't happen when adding a Preview Mesh either.
1. Open any material in Content Browser by double clicking
2. Scroll down in the Details panel and find Thumbnail
3. Click the drop-down beside Primitive Type and select either TPT Cube, TPT Cylinder, or TPT Plane
4. (Optional) If needed add a Preview Mesh to see if that changes the Preview Material
Results: The Thumbnail does not set in the Materials Preview or Content Browser when selecting the Primitive Type, Applying changes, or Saving the Material.
Expected: Material Preview and Thumbnails update when changing Primitive Type or Applying/Saving changes.
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