Cannot access dynamic properties from QJSEngine

int main( int argc, char* argv[] )
{
    QCoreApplication app( argc, argv );

    {
        auto myObject = new QObject();
        myObject->setProperty( "myProp", 42 );

        QScriptEngine engine;

        auto scriptMyObject = engine.newQObject( myObject );
        engine.globalObject().setProperty( "myObject", scriptMyObject );

        cout << engine.evaluate( "myObject.myProp" ).toInt32() << endl;
    }

    {
        auto myObject = new QObject();
        myObject->setProperty( "myProp", 42 );

        QJSEngine engine;

        auto scriptMyObject = engine.newQObject( myObject );
        engine.globalObject().setProperty( "myObject", scriptMyObject );

        cout << engine.evaluate( "myObject.myProp" ).toInt() << endl;
    }

    return EXIT_SUCCESS;
}

42
0