Vue 3, SocketIO - won't join the room after login and router push - vue.js

Question

I am experiencing the following issue - once the user is logged in, and onMounted event is finished, SocketIO client side should join the room. But this doesn't happen for some reason. I have to manually refresh browser in order to join the room. What am I doing wrong here?
I have the following code for the SocketIO on the client side:
import { io } from "socket.io-client";
const token = window.localStorage.getItem('TOKEN') || window.sessionStorage.getItem('TOKEN')
console.log(token);
const ioSocket = io('https://dolphin-app-e4ozn.ondigitalocean.app', {
withCredentials: true,
transportOptions: {
polling: {
extraHeaders: {
'authorization': `${token}`,
},
},
},
});
export const socket = ioSocket
The vue 3 router logic:
import { createRouter, createWebHistory } from 'vue-router'
import Landing from '#/views/Landing.vue'
import Login from '#/views/login/Login.vue'
import ResetPassword from '#/views/login/ResetPassword.vue'
import ForgotPassword from '#/views/login/ForgotPassword.vue'
const routes = [
{
path: '/login',
name: 'login',
component: Login,
meta: {
isGuest: true,
title: 'Servant | Login'
}
},
{
path: '/resetPassword',
name: 'resetPassword',
component: ResetPassword,
meta: {
isGuest: true,
title: 'Servant | Reset Password'
}
},
{
path: '/forgotPassword',
name: 'forgotPassword',
component: ForgotPassword,
meta: {
isGuest: true,
title: 'Servant | Forgot Password'
}
},
{
path: '/',
name: 'landing',
component: Landing,
meta: {
requiresAuth: true,
title: 'Servant',
role: 'waiter'
}
},
{
path: '/:pathMatch(.*)*',
component: Landing
},
]
const router = createRouter({
history: createWebHistory(),
routes,
scrollBehavior() {
// always scroll to top
return { top: 0 }
},
})
router.beforeEach((to, from, next) => {
document.title = to.meta.title || "Servant"
let token = window.localStorage.getItem('TOKEN') || window.sessionStorage.getItem('TOKEN')
if(to.meta.requiresAuth && !token)
{
next({name: 'login'})
}
if (token && to.meta.isGuest )
{
next({ name: 'landing' })
}
next();
});
export default router
Login component logic:
function login() {
loading.value = true
formClass = ''
if (user.remember)
{
window.localStorage.setItem('remember', user.remember)
}
mainStore
.login(user)
.then((response) => {
loading.value = false
router.push({
name: 'landing',
})
})
.catch((err) => {
loading.value = false
errorMsg.value = err.response.data.messages.error
formClass = 'was-validated'
})
}
Once the component is mounter I have following logic:
onMounted(() => {
socket.emit("join", import.meta.env.VITE_SOCKET_ROOM, (message) => {
console.log(message);
});
})
On the SocketIO server side I have following logic:
io.use((socket, next) => {
const header = socket.handshake.headers["authorization"];
if(header !== 'null')
{
jwtVerify(header, secret).then((res) => {
if (res === true) {
const jwt = jwtDecode(header);
servantID = jwt.payload.iss;
return next();
}
return next(new Error("authentication error"));
});
}
});