Errors being 400 or connection failed

it works if there are no clusters just single instance of node server

nodejs app is running behind coolify (traefik)

sessions are sticky using pg, express-session, connect-pg-simple

const app = express()
...
const server = http.createServer(app)

...
const sessionConfig = {
    store: new (connectPgStore(expressSession))({}),
    secret: process.env.COOKIE_SECRET,
    resave: false,
    saveUninitialized: true,
    cookie: {
        maxAge: 30 * 24 * 60 * 60 * 1000,
        proxy: false,
        saveUninitialized: true,
        resave: true
    },
    sameSite: 'none; Secure'
}

const sessesionMiddleware = expressSession(sessionConfig)
app.use(sessesionMiddleware)



...

import { createAdapter } from '@socket.io/redis-adapter'
import { Redis } from 'ioredis'
import { Server } from 'socket.io'


const subClient = pubClient.duplicate()

const io = new Server(server, {
    adapter: createAdapter(pubClient, subClient)
})