Assembly3 error when using Reference line of a Sketch file to create an Element

A brief clarification. In my CAD practice, Reference line and Construction line are synonymous. The nomenclature depends on the software you are using. FreeCAD uses the Construction line nomenclature by placing these lines in blue color. These are lines that help (assist) in the construction of geometric structures but are ignored (made visible) by the CAD software when the user leaves Sketch editing mode.

Different from these are the Geometric lines (white lines, in FreeCAD Sketcher Workbench) that when created form geometric figures used in 3D modeling.

Understand the current problem. Watch this video:

Link to the project files:
https://drive.google.com/drive/folders/1j4_haVb3IuLhRJn3q0s8SpGLjhGHwi4M

A simplified sequence can be seen in the image below:

Click in the image for expansive.

Am I doing the same procedure performed in this Assembly 3 tutorial:

https://github.com/realthunder/FreeCAD_assembly3/wiki/How-to-Handle-Large-Scale-Assembly

Where is the error in performing this action?

Reponse: Everything indicates that it is a limitation in the current version of Assembly 3, when using Reference Line (blue line). Wait for new updates!

My FreeCAD settings:
Version: 0.19
Revision Number: 22894 (Git)
Release date: 2020/10/31

Current solution: An alternative approach is to use a second Sketch to create a Construction Line (white line) and then use that line to create the Element. The image below describes a step-by-step:

Click in the image for expansive.