Good Morning,
I'm able to make drop points on multiple layers, and move segments between layers. If I try to Edit Cables in a Route that spans between layers, It will "auto highlight" the route properly, but then returns an error that the segments don't exist. Please see image. As you can see, the route is highlighted purple, so the system is seeing the top drop point on Layer 2 connected to the bottom drop point on Layer 1, but it will not create the cables within that route.