Context properties are not consistently available for child items created in stateless JS library

An item created using the following function in a stateless JS library does not have access to properties that are available in the context of theParent:

function createObjectFromFile(fileName, theParent) {
var component = Qt.createComponent(fileName);
return component.createObject(theParent);
}

See attachment where an item is created in a JS library file four times in slightly different ways. Cases A, B, C work but case D fails with "MyText.qml:4: ReferenceError: root is not defined"

I could understand a logic where an item created in a stateless library does not have a context, but in this case, the parent of the created item does have access to the properties in the context, and I would expect cases C and D to give the same results.