Multiple Primitives created when importing a mesh with "One Convex Hull Per UCX" disabled

User has encountered an issue with duplicate collision primitives when importing custom collision meshes from Maya

1. Open Maya
2. Create a cube in Maya, name it "Test"
3. Create another cube to serve as collision, name it "UCX_Test"
4. Select both meshes in the outliner
5. Export selection from Maya as an FBX
6. Import into UE4, and in the import settings, uncheck "One convex hull per UCX"
7. Open the asset in the Static Mesh Editor
8. Select the Collision Primitive in the Static Mesh Editor Viewport
9. Move the collision primitive

Results:
2 Convex primitives are created
Expected:
Only one primitive would be created