Imported meshes losing color after build

Hi there. In blender I made some meshes and gave them color. I imported both the mesh and color as a material into UE4 and it looks fine when it’s placed into the level and if I hit ‘play.’ The problem is if I build then the color turns to black, even though it still has the original material. Does anyone know how I could fix this? Blender only exports fbx using an older version, I suspect that could be it.

Create a 2nd uv channel with a proper lightmap: