QNetworkConfigurationManager::isOnline() returns false when there is already active network connection

There is a quote from PoC (full PoC is attached to this issue):

AppController::AppController(QWidget *parent) : QWidget(parent), ui(new Ui::AppController)
{
NetworkConfigurationManager = new QNetworkConfigurationManager();
NetworkSession = NULL;

connect(NetworkConfigurationManager, SIGNAL(onlineStateChanged(bool)), SLOT(OnlineStateChanged(bool)));

QTimer::singleShot(0, this, SLOT(InitNetwork()));
}

void AppController::InitNetwork()
{
QCoreApplication::processEvents();

QMessageBox::information(this, "InitNetwork: isOnline()", QString("InitNetwork: isOnline(): %1").arg(NetworkConfigurationManager->isOnline()));

if (NetworkSession == NULL)

{ OnlineStateChanged(NetworkConfigurationManager->isOnline()); }

}

void AppController::OnlineStateChanged(bool is_online)
{
QMessageBox::information(this, "OnlineStateChanged: is_online", QString("OnlineStateChanged: is_online: %1").arg(is_online));

if (!is_online) {
if (NetworkSession != NULL)

{ NetworkSession->deleteLater(); }

NetworkSession = new QNetworkSession(NetworkConfigurationManager->defaultConfiguration());

connect(NetworkSession, SIGNAL(opened()), SLOT(NetworkSessionOpened()));
connect(NetworkSession, SIGNAL(error(QNetworkSession::SessionError)), SLOT(NetworkSessionError(QNetworkSession::SessionError)));

NetworkSession->open();
}
}

void AppController::NetworkSessionOpened()
{
QMessageBox::information(this, "NetworkSessionOpened: isOnline()", QString("NetworkSessionOpened: isOnline(): %1").arg(NetworkConfigurationManager->isOnline()));

OnlineStateChanged(NetworkConfigurationManager->isOnline());
}

void AppController::NetworkSessionError(QNetworkSession::SessionError)
{
QMessageBox::information(this, "NetworkSessionError: isOnline()", QString("NetworkSessionError: isOnline(): %1").arg(NetworkConfigurationManager->isOnline()));

OnlineStateChanged(NetworkConfigurationManager->isOnline());
}

When there is already active network connection (for example, started by another application), NetworkConfigurationManager->isOnline() always return false, even when NetworkSessionOpened() is fired.