FreeForm Rebar Stretch

I am creating Rebars with Create.FreeFormRebar in a specific quantity. In some cases, I need to manually adjust the length of the Rebars in Revit. In the first image, when I try to modify one of the Rebars, only one of them changes, and the others disappear. I want only one Rebar to change without the others disappearing. In the second image, I have manually sketched Rebars in Revit, and I can extend or shorten their lengths using the arrows visible at the ends. Why don’t these arrows appear in the Rebars I created with FreeFormRebar in Dynamo?

When I used Create.FromCurves instead of Create.FreeFormRebar, my issue was resolved.