Unexpected visibleChanged signals on QQuickItem destruction

class ItemForTesting: public QQuickItem {
    Q_OBJECT
public:
    explicit ItemForTesting(QQuickItem *parent = nullptr);
    ~ItemForTesting() override = default;
    void doSomthing();
};

ItemForTesting::ItemForTesting(QQuickItem *parent)
    : QQuickItem(parent)
{}
void ItemForTesting::doSomthing()
{
    // do something
}
//// Test case
{
....
    QPointer<ItemForTesting> mainItem = new ItemForTesting(m_rootItem);
    mainItem->setVisible(false); // in this case visibleChanged will be emitted for item and for child items
    mainItem->connect(mainItem.data(), &QQuickItem::parentChanged, mainItem.data(), [=]() {
        qCritical() << "ParentChanged for mainItem. Check pointer" << QQmlData::wasDeleted(mainItem.data()) << mainItem.isNull();        
    });
    mainItem->connect(mainItem.data(), &QQuickItem::visibleChanged, mainItem.data(), [=]() {
        qCritical() << "visibleChanged for mainItem to" << mainItem->isVisible() << "Check pointer" << QQmlData::wasDeleted(mainItem.data()) << mainItem.isNull();
        mainItem->doSomething();
   });    

    QQuickItem *childItem = new QQuickItem(mainItem);
    childItem->connect(childItem, &QQuickItem::visibleChanged, childItem, [=]() {
        qCritical() << "visibleChanged for childItem to" << childItem->isVisible();
        // do something
    });

    QSignalSpy spyDestroy(mainItem, &QObject::destroyed);
    mainItem->deleteLater();
    spyDestroy.wait();
    EXPECT_EQ(spyDestroy.count(), 1);
}