QtQuick Controls TextField big font position bug during edition

import QtQuick 2.3
import QtQuick.Controls 1.2
     
TextField {
    property string color: "dark"
    property int colorFactor: 87
     
    function isEmpty(){
        if( text === "" ){
            return true;
        }
        else{
            return false;
        }
    }
    font.pointSize: 34
}