QML Textfield is duping itself

#testqml.py

import sys
from PySide2.QtWidgets import QApplication
from PySide2.QtCore import Qt, QUrl
from PySide2.QtQuick import QQuickView

if __name__ == "__main__":

    app = QApplication(sys.argv)
    app.setAttribute(Qt.AA_DisableWindowContextHelpButton)

    view = QQuickView()
    view.setResizeMode(QQuickView.SizeRootObjectToView)
    view.setSource(QUrl.fromLocalFile("Login.qml"))
    view.show()
    sys.exit(app.exec_())

import QtQuick 2.4
import QtQuick.Controls 2.3

LoginForm {
    Column {
        id: column
        anchors.rightMargin: parent.width/8
        anchors.leftMargin: parent.width/8
        anchors.bottomMargin: parent.height/8
        anchors.topMargin: parent.height/8
        anchors.fill: parent



        ComboBox {
            id: username
            anchors.right: parent.right
            anchors.rightMargin: 0
            anchors.left: parent.left
            anchors.leftMargin: 0
            anchors.top: parent.top
            anchors.topMargin: 0
        }
        TextField {
            id: password
            placeholderText: "Passwort"
            anchors.right: parent.right
            anchors.rightMargin: 0
            anchors.left: parent.left
            anchors.leftMargin: 0
            anchors.verticalCenter: parent.verticalCenter
            echoMode: TextInput.Password
        }

        Button {
            id: loginbutton
            text: qsTr("Login")
            display: AbstractButton.TextOnly
            anchors.right: parent.right
            anchors.rightMargin: 0
            anchors.left: parent.left
            anchors.leftMargin: 0
            anchors.bottom: parent.bottom
            anchors.bottomMargin: 0
        }
    }
}

/*##^## Designer {
    D{i:2;anchors_height:400;anchors_width:200;anchors_x:122;anchors_y:37}
}
 ##^##*/