close, end, error never called when socket is killed (non gracefully) at the other end

[chadham]

On Swift 4+, connecting to a web socket on an esp8266. When I restart the ESP, the socket is obviously closed, but none of the events fire in the swift code. Tried with the event methods and delegate methods....

//~~
socket = WebSocket("ws://" + IP + ":" + String(port))
        socket.delegate = self
        socket.open()
        socket.event.error = { (e) in
            print("SOCKET ERROR \(e)")
        }
        socket.event.close = { code, reason, clean in
            print("closed due to code \(code), reason \(reason), clean \(clean)")
            }
        socket.event.end = {code, reason, clean, error  in
            print("end due to code \(code), reason \(reason), clean \(clean), error \(String(describing: error))")
        }
//~~

extension WebSocketClient: WebSocketDelegate{
    func webSocketMessageText(_ text: String) {
        NotificationCenter.default.post(Notification(name: Notification.Name(rawValue:Constants.WEBSocketMessageReceived),object: self,userInfo: ["message": text]))
    }

    func webSocketMessageData(_ data: Data) {
        print("Websocket received data \(data)")

    }

    func webSocketOpen() {
        print("WEBSocket opened to \(IP):\(port)")
        connected = true
        observer.connected(client: self)
    }

    func webSocketClose(_ code: Int, reason: String, wasClean: Bool) {
        print("WEBSocket closed to \(IP):\(port)")
        connected = false
        observer.disconnected(client: self)
    }

    func webSocketError(_ error: NSError) {
        print("WEBSocket error on \(IP):\(port)")
    }

    func webSocketEnd(_ code: Int, reason: String, wasClean: Bool, error: NSError?) {
        print("WEBSocket closed to \(IP):\(port)")
        connected = false
        observer.disconnected(client: self)
    }

}