EditorCube added to the scene with a Geometry Script will have reversed normals

The work around is to use the modeling mode normal tool to regenerate normals.
This appears to mainly occur on any cubes added by the "Copy Mesh from Static Mesh"
Regression tested in 5.0.3 at CL 20979098 where the issue is not able to be tested.

1. Create a Blank Project
2. Enable the Geometry Script plugin (restart when prompted)
3. Open a basic level
4. Create a new blueprint class
5. Search for the blueprint type "GeneratedDynamicMeshActor"
6. In the event graph, add a "Event On Rebuild Generated Mesh" node
7. drag off the mesh pin, search for and add "Copy Mesh from Static Mesh"
8. Set the static mesh component to "Editor Cube"
9. Compile and save blueprint
10. Bring the blueprint into the level
11. add a stand alone instance of Editor Cube to the level to use as reference
12. Create and open a new material
13. Connect a Texture Sample using "ReferenceNormalMap" to the normal output
14. apply the material to both cubes
    Actual Result:
    The cube created with the geometry script will have an inverted normal map
    Expected result:
    The cube's will render the same.