SetWriteDeadline throws error that does not recover

[Ahmad940]

im using the chat example as in the fasthttp/webscoket repo's example and the SetWriteDeadline throws error each time a user disconnect which does not recover till server is restarted
c.Conn.SetWriteDeadline(time.Now().Add(writeWait))

[Ahmad940]

this is the cod example

// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package hub

import (
	"fmt"
	"log"
	"time"

	"github.com/gofiber/websocket/v2"
)

const (
	// Time allowed to write a message to the peer.
	writeWait = 10 * time.Second

	// Time allowed to read the next pong message from the peer.
	pongWait = 60 * time.Second

	// Send pings to peer with this period. Must be less than pongWait.
	pingPeriod = (pongWait * 9) / 10

	// Maximum message size allowed from peer.
	maxMessageSize = 512
)

var (
	newline = []byte{'\n'}
	space   = []byte{' '}
)

// Client is a middleman between the websocket connection and the hub.
type Client struct {
	Hub *Hub

	// The websocket connection.
	Conn *websocket.Conn

	// Buffered channel of outbound messages.
	Send chan Message
}

// ReadPump pumps messages from the websocket connection to the hub.
//
// The application runs ReadPump in a per-connection goroutine. The application
// ensures that there is at most one reader on a connection by executing all
// reads from this goroutine.
func (c *Client) ReadPump() {
	defer func() {
		c.Hub.Unregister <- c
		c.Conn.Close()
	}()
	c.Conn.SetReadLimit(maxMessageSize)
	c.Conn.SetReadDeadline(time.Now().Add(pongWait))
	c.Conn.SetPongHandler(func(string) error { c.Conn.SetReadDeadline(time.Now().Add(pongWait)); return nil })
	for {
		var message Message
		err := c.Conn.ReadJSON(&message)
		if err != nil {
			if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
				log.Printf("error: %v", err)
			}
			break
		}
		c.Hub.Broadcast <- message
	}
}

// WritePump pumps messages from the hub to the websocket connection.
//
// A goroutine running WritePump is started for each connection. The
// application ensures that there is at most one writer to a connection by
// executing all writes from this goroutine.
func (c *Client) WritePump() {
	ticker := time.NewTicker(pingPeriod)
	defer func() {
		ticker.Stop()
		c.Conn.Close()
	}()
	for {
		select {
		case message, ok := <-c.Send:
			c.Conn.SetWriteDeadline(time.Now().Add(writeWait))
			if !ok {
				// The hub closed the channel.
				// c.Conn.WriteMessage(websocket.CloseMessage, []byte{})
				break
			}

			err := c.Conn.WriteJSON(message)
			if err != nil {
				fmt.Println("Error writing json", err.Error())
				return
			}

		case <-ticker.C:
			c.Conn.SetWriteDeadline(time.Now().Add(writeWait))
			if err := c.Conn.WriteMessage(websocket.PingMessage, nil); err != nil {
				return
			}
		}
	}
}