QNetworkSession::close() can't close connection established by QNetworkAccessManager::get()

Steps to reproduce

1. Open the test application (attached: NetworkConfigurationTest.sis)
2. Click the "QNetworkAccessManager::get()" button
3. After receiving the reply, click the "QNetworkSession::close()" button

Actual Result

• Connection stays open

Expected Result

• Connection is closed

Additional Inrofmation

• If the connection is established by QNetworkSession::open(), it can be closed successfully.