HorizontalHeaderView textRole not working

RYDJ

I have a Table View with custom c++ QAbstractTableModel class as the model.

The model has custom roles sent back to qml using a QHash.
The roles are:
{{Header Data, "HData" }, {First Name, "FName" }, {LastName, "LName" } } ;

The table fills normally

Now :

HorizontalHeaderView {
    id: horizontalHeader
    syncView: tableView
    anchors.left: tableView.left
    textRole: "display" // which is the default
}

The above results in HeaderData() method to be in voked, but if I change "display" to any other role the method never gets invoked.

Now I have a workaround to display the header text, but why is this happening I believe this might be a bug.