Route Segment Properties - Not allowed to define bundle diameter

I have a cable assembly that for whatever reason, I am unable to manually modify and fix bundle diameters through certain segments.

The path from connector to main bundle is modifiable, however the bundle itself is fixed and I am unable to change.

This is what I see:

In the past I have seen this, and have never been blocked from changing the diameter. Any thoughts?

SolidworksRouting