Staticmesh "Reimport+LODs" do not recover the material ID for custom LOD

1. Import attached fbx SimpleMesh.fbx
2. open the staticmesh editor
3. import the attach fbx SimpleMesh_LOD1.fbx has a new LOD
   • Right Click Simplemesh.fbx > Level of Detail > Import > Add LOD1
4. click on the arrow on the right of "Reimport Base Mesh" toolbar button and select "Reimport Base Mesh + LODs"

RESULT: The LOD 1 section is not using anymore the third material that was added when we import the LOD it use the first material instead.

EXPECTED: The re-import should give the same result