Creating MapPolyline using MapItemView renders the path property of the MapPolyline inaccessible

I am using MapItemView to create MapPolylines from a model. Once I have created the polylines I would like to change the path variable however trying to read the path causes a memory access violation.
The issue also occurs when creating MapPolygons from a model.

In the attached example I am using a ListModel and once the delegate component is completed the program attempts to read the path and in my environment it crashes.