Material properties are lost when replacing a mesh

If you replace a mesh, there is no material property anymore, just the mesh. This happened with macOs Mojave and also in Windows 10.

• Saving and collapse/expand does not help, quitting application and then opening updates the scene graph but item is not visible.
• Changing back to original mesh updates the canvas + inspector property but scenegraph does not update, it displays the previous mesh, not the selected one.

See image examples below.

Similar thing happened with maps. You could collapse the model until material but could not see maps at all regardless of there were 2 of them. no example images about that.