QNetworkSession::stop() not working on N900

When calling stop() on an active session its state changes from 'Connected' to 'Closing' but never reaches 'Disconnected' (and the connection on the device is not being terminated).

In detail I tried to disconnect an active session by this code

QList<QNetworkConfiguration> configurations = mManager.allConfigurations ( QNetworkConfiguration::Discovered );
QNetworkConfiguration config;
foreach(config, configurations) {
if(config.state() == QNetworkConfiguration::Active ) {
mSession = new QNetworkSession(config, this);
qDebug() << "about to stop";
mSession->stop();
while(mSession->state() != QNetworkSession::Disconnected)

{ sleep(1); qDebug() << "Wait.." << mSession->state(); }

}
}

The while loop remains waiting:

about to stop
Wait.. 4
Wait.. 4
Wait.. 4
Wait.. 4