This bug is best explained by code.

The following inside a PathView works:
model: VisualDataModel {
delegate: Text

{ text: value }

model : ListModel {
id: mo
ListElement

{ value: "ding" }

ListElement

{ value: "dong" }

ListElement

{ value: "bell" }

}
}

If you refactor the above code into below, it doesn't work (PathView does not display anything)
ListModel {
id: mo
ListElement

{ value: "ding" }

ListElement

{ value: "dong" }

ListElement

{ value: "bell" }

}

model: VisualDataModel {
delegate: Text

{ text: value }

model : mo
}