Bluetooth socket never get disconnected signal from server on Windows

I joined a sample, which is in fact btchat example from Qt, which I have modified in order to display a message on the client when the server quits.

If I run the client on Windows the client never gets notified that the server closed (from QBluetoothSocket disconnected signal). If for instance I run the client on MacOS I get the notification. The server runs on Android.

Thanks,

Philippe.