SW Electrical - multiple line diagram representations of the same cable harness?

Hi,

How do I allow a cable harness to be represented multiple times through the line diagram lines? This was working for me previously, but now it's not. I have a harness with connectors and cables defined in a detailed schematic. I represented the harness through line diagram symbols and lines to give an overview of it (1st cable diagram). But I also want to represent it again on a system-level diagram (2nd cable diagram), as the harness gets used in a wider system.

When it was working, the Cables and Cores Reservation menu showed check boxes by cables and cores that were already associated between the two connectors. I would just check the boxes and it allowed for a 2nd representation of the harness through line diagram lines.

Any ideas on what is preventing multiple cable diagram representations of the same harness?

Two line diagram representations of the same cable harness. The 1st cable diagram has successful associations (as seen by the cable names appearing above the line diagram lines). I'm unable to associate the lines in the 2nd diagram with the cables CBL1, CBL2, CBL3 (but I was able to previously).
When I try to assign the line diagram line to the existing cables, it shows no check boxes by the cables to allow the association (but it used to allow it).