It would be great is when you define the Rise and Fall Symbols in Fabrication. They behaved as described by Autodesk.
https://knowledge.autodesk.com/support/revit/learn-explore/caas/CloudHelp/cloudhelp/2019/ENU/Revit-M...
See Case ID: 17976601
An Even Better Idea would be to be able to use the Symbols available In Revit for System Families (Duct,Pipe,etc)
