When importing FBX meshes with multiple objects, if I use the "Paint Material" paint-bucket, it removes that Mesh from the Material list. And I cannot select that mesh again using the Pick Material tool.

1. Import FBX mesh with multiple objects.
2. Use the Pick Material tool (B) to select one mesh.
3. Change the diffuse colour of the mesh.
4. Use the Paint Material paint-bucket on a different mesh.
5. The mesh you clicked on disappears from the material list.