I think it's a bug but it's difficult to explain.
Run FreeCAD
Create New Document
Create an Arch Object
Create an Arch Section of this object.
Set her placement different to origin placement.(I think it's almost a problem with angle)
Get a Shape2DView of this section.
Now Move the Shape2DView with the Placement Tool.
Apply change.
You would see the visual placement of Arch Section is changed, the reper of the Section seem wrong.
But when you re-open the file, it seem that Arch Section come back to her right position.
Just move the Shape2DView with Placement Tool and say to me if you have the same behaviour.