Nodejs + ( Socket.IO, Express 5.0 ) behing Nginx ( SSL ) -> Only Android/Ios Socket.IO gives -> xhr polling request "canceled"

[deffulsFHSS]

I have a docker compose with 4 containers:

1. Nodejs Container
2. Nginx Container
3. Coturn Container
4. Database Container

Nodejs Container listens on port 5001 internally and is listening using Express and Socket.IO. ( Code will be provided below).
I have two namespaces for socket.io /users and /videochat

The strange thing is that if you connect from PC ( Windows, MacOs, Linux ) any browser, connection is established succesfully.
But only from Android/Ios application, socket.io cannot connect. Using usb-debugging and watching requests in "chrome://inspect#devices" (Network Tab). I saw following request error:

URL: mydomain.com/socket.io/?EIO=4&transport=polling&t=Oc7fPq6 
STATUS: canceled
TYPE: xhr
SIZE: 0 B

UPDATED. I got error log from Android App, please do someone understand why ?
2023-07-25 14:37:30.426 9286-9482/com.myapp.app E/chromium: [ERROR:ssl_client_socket_impl.cc(978)] handshake failed; returned -1, SSL error code 1, net_error -202

Socket client are connecting to URL: "https://mydomain.com/users"

events {
    worker_connections 1024;
}

http {

    server {
        listen 443 ssl;
        server_name mydomain.com www.mydomain.com;

        resolver 127.0.0.11;

        ssl_certificate /etc/certificates/cert.pem;
        ssl_certificate_key /etc/certificates/privkey.pem;

        location /socket.io/ {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            
            proxy_pass http://nodejs_container:5001;
            
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

        }

        location /videochat {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            
            proxy_pass http://nodejs_container:5001;
            
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }

        location /users {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            
            proxy_pass http://nodejs_container:5001;
            
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }

        location ~ ^/call/([^/]+)/([^/]+)/([^/]+) {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            
            proxy_pass http://nodejs_container:5001;
            
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
    }
}

let SocketServer = require('./core/socket_server.js');
const bodyparser = require('body-parser');

const cors = require('cors');
const express = require('express');
const app = express();

const server = require('http').createServer(app);

const io = require('socket.io')(server, {
  cors: {
    origin: "*",
    methods: ["GET", "POST"],
    transports: ['websocket', 'xhr-polling'],
    credentials: false
  },
  allowEIO3: true
});

let SockServer = new SocketServer(io);

app.set('view engine', 'ejs');
app.use(bodyparser.json());

app.use('/call/:room_id/:user_id/:video_state', express.static('public'));

app.get('/call/:room_id/:user_id/:video_state', async (request, response) => {

  await response.render('video_chat', {
      room_id: request.params.room_id,
      user_id: request.params.user_id,
      video_state: Number(request.params.video_state)
      });
});

server.listen(5001, "0.0.0.0");
SockServer.ServerInitialize();

app.use(cors({
  origin: "*"
}));

[deffulsFHSS]

Oh my god

Fixed by adding in nginx config instead of
ssl_certificate /etc/certificates/cert.pem;
Use
ssl_certificate /etc/certificates/fullchain.pem;

This fullchain should be generated if you use lets encrypt.