Socket with if-loops does not give a consistent result

The program is continuously receiving data from the sender side. And I have a checked/unchecked button when I make it checked it runs the if part...that's good. Now I make it unchecked then else part runs and prints Unchecked going to close socket, so that's also good.

The problem is when I am going to make it again checked (2nd time) to run if part again it just print Checked and my program hangs. Why is this happening? It should receive the data but it hangs. Please tell me the solution.

def show_markers(self):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    host = socket.gethostbyname('192.168.225.12')
    s.connect((host, port))
    scale=0

    while True:

        if self.iconAction.isChecked():
            print ('Checked')
            m = QgsVertexMarker(self.iface.mapCanvas())
            data = s.recv(SIZE)
            data1 = s.recv(SIZE)
            c = data.decode()
            d = data1.decode()
            x = float(c)
            y = float(d)
            print("printing X :", x)
            print("printing Y :", y)
            rect = QgsRectangle(float(x)-scale, float(y)-scale, float(x)+scale, float(y)+scale)
            me = self.iface.mapCanvas()
            me.setExtent(rect)
            me.refresh()
            m.setCenter(QgsPointXY(x, y))
            m.setColor(QColor(255, 0, 0))
            m.setIconSize(7)
            m.setIconType(QgsVertexMarker.ICON_X)  # or ICON_CROSS, ICON_X
            m.setPenWidth(3)

        else:
            print('Unchecked going to close socket')
            s.shutdown(10)
            s.close()

I am assuming it should work like:

1. 1st time click on button ---> Checked & if part run [working]
2. 2nd time click on button ---> Unchecked & else part run [working]
3. 3rd time click on button ---> again it Checked [here it checked but my program hangs & not receiving the data from sender computer]

Comienza en el punto de entrada show_markers y sigue el bucle en torno al estado de la casilla de verificación, las llamadas a recv y las rutas de shutdown/close del socket. Reproduce la secuencia de tres cambios y, a continuación, verifica que al volver al estado marcado se reciben datos sin que se produzca un bloqueo y que el ciclo de vida del socket sigue siendo válido.