[WinRT] Cannot connect to Bluetooth (standard) service

I try to connect to a Bluetooth Rfcomm SerialPort service using QBluetoothSocket::connectToService(const QBluetoothServiceInfo &service, OpenMode openMode = ReadWrite).

The call returns successfully, after a few seconds the event QBluetoothSocket::error is raised with the error QBluetoothSocket::UnknownSocketError.

The QBluetoothServiceInfo given as parameter is built manually using the QBluetoothDeviceInfo got from the device discovery. The device is paired using Windows configuration interface.

Enabling QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true")); shows no additional information.

The same code works using Android.