QWebSocket: getting QAbstractSocket::UnknownSocketError following successful request-reply connection

[rmam]

After tweaking the QWebSocket client and server examples to perform a request-reply connection, I've noticed that the client was receiving a QWebSocket::error signal with a QAbstractSocket::UnknownSocketError just before closing the connection. After googling after reports of similar cases, the best that I've managed to stumble on was this Stack Overflow post which states that there was no error, which contradicts the fact that the QWebSocket::error signal is being emitted. Does anyone know what might be triggering this error, and if this actually indicates a real error?