QMetaObjectBuilder does not properly carry property flags

class TestTest : public QObject
{
    Q_OBJECT
    Q_ENUMS(MyEnum)
    Q_FLAGS(MyEnumFlag)
    Q_PROPERTY(MyEnumFlag fprop READ fprop)
public:
    enum MyEnum { A = 0x01, B = 0x02 };
    Q_DECLARE_FLAGS(MyEnumFlag, MyEnum);
    MyEnumFlag fprop() const { return A; }
};
Q_DECLARE_OPERATORS_FOR_FLAGS(TestTest::MyEnumFlag)

        QMetaObjectBuilder builder(&TestTest::staticMetaObject);
        QMetaObject *meta = builder.toMetaObject();

            auto i = m->indexOfProperty("fprop");
            QMetaProperty p = m->property(i);
            qDebug() << i << p.name() << p.typeName() << p.isEnumType() << p.isFlagType();

1 fprop QFlags<TestTest::MyEnum> true true
1 fprop QFlags<TestTest::MyEnum> false false