The requested item could not be loaded on Android 9 via 3G

[Kolyall]

Device: Android 9.0, Google Pixel 2 XL

 api('io.socket:socket.io-client:1.0.0') {
        exclude group: 'org.json', module: 'json'
    }

When I connecting to socket via Wi-Fi all works fine. But when I trying to connect via Mobile Internet the error occurs

mSocket.on(Socket.EVENT_CONNECT_ERROR, new Emitter.Listener() {
                @Override
                public void call(Object... args) {
                  if (args.length> 0 && args[0] instanceof EngineIOException){
                        ((EngineIOException)args[0]).printStackTrace();
                    }
               }
            });

Packet data:
parser error
EngineIOException:

io.socket.engineio.client.EngineIOException: server error
    at io.socket.engineio.client.Socket.onPacket(Socket.java:547)
    at io.socket.engineio.client.Socket.access$1000(Socket.java:36)
    at io.socket.engineio.client.Socket$5.call(Socket.java:335)
    at io.socket.emitter.Emitter.emit(Emitter.java:117)
    at io.socket.engineio.client.Transport.onPacket(Transport.java:126)
    at io.socket.engineio.client.transports.Polling.access$700(Polling.java:18)
    at io.socket.engineio.client.transports.Polling$2.call(Polling.java:127)
    at io.socket.engineio.parser.Parser.decodePayload(Parser.java:222)
    at io.socket.engineio.client.transports.Polling._onData(Polling.java:135)
    at io.socket.engineio.client.transports.Polling.onData(Polling.java:102)
    at io.socket.engineio.client.transports.PollingXHR$5$1.run(PollingXHR.java:125)
    at io.socket.thread.EventThread$2.run(EventThread.java:80)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    at java.lang.Thread.run(Thread.java:764)

Why polling got data as xml on Mobile Internet? And Content-Type: text/vnd.wap.wm?

neio.client.transports.Polling: polling got data <?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">

<wml>
<card id="FEHLER" title="ERROR">
<p>
The requested item could not be loaded <br/>
Wrong MIME-Type
<do type="prev" label="back">
<prev/>
</do>

</p>
</card>
</wml>

Here is log from logger:

2018-11-01 11:55:26.168 : io.socket.client.IO: ignoring socket cache for http://myserverexample.com:80/
2018-11-01 11:55:26.187 : io.socket.client.Manager: readyState CLOSED
2018-11-01 11:55:26.189 : io.socket.client.Manager: opening http://myserverexample.com:80/
2018-11-01 11:55:26.192 : io.socket.client.Manager: connection attempt will timeout after 20000
2018-11-01 11:55:26.195 : .socket.engineio.client.Socket: creating transport 'polling'
2018-11-01 11:55:26.199 : .socket.engineio.client.Socket: setting transport polling
2018-11-01 11:55:26.202 : neio.client.transports.Polling: polling
2018-11-01 11:55:26.203 : o.client.transports.PollingXHR: xhr poll
2018-11-01 11:55:26.205 : o.client.transports.PollingXHR: xhr open GET: http://myserverexample.com/socket.io/?EIO=3&transport=polling
2018-11-01 11:55:26.208 : o.client.transports.PollingXHR: sending xhr with url http://myserverexample.com/socket.io/?EIO=3&transport=polling | data null
2018-11-01 11:55:26.310 : neio.client.transports.Polling: polling got data <?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">

<wml>
<card id="FEHLER" title="ERROR">
<p>
The requested item could not be loaded <br/>
Wrong MIME-Type
<do type="prev" label="back">
<prev/>
</do>

</p>
</card>
</wml>

2018-11-01 11:55:26.216 : Request: +------ Request ------------------------------------------------------------------------
2018-11-01 11:55:26.217 : Request: ¦ URL: http://myserverexample.com/socket.io/?EIO=3&transport=polling
2018-11-01 11:55:26.218 : Request: ¦
2018-11-01 11:55:26.218 : Request: ¦ Method: @GET
2018-11-01 11:55:26.218 : Request: ¦
2018-11-01 11:55:26.219 : Request: ¦ Headers:
2018-11-01 11:55:26.219 : Request: ¦ + Accept: application/json
2018-11-01 11:55:26.219 : Request: ¦ + X-Request-ID: 43cb7c38-bf18-492a-beea-ceefbe2a8a9a
2018-11-01 11:55:26.221 : Request: ¦ + Accept-Language: ru-BY
2018-11-01 11:55:26.221 : Request: ¦ + Authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjViNGM4YjdhMTY0ZGIwMDIxOGE4YjM1ZiIsImhhc2giOiIk
2018-11-01 11:55:26.222 : Request: ¦ MmEkMTAkM1hTM09NbVhxVjNITzVQTTFnTlBxLkE1LmltNElIR291S3E1Y1A1b2ZhUWxsRTlMaFhrNC4iLCJyb2xlIjoiNTlmODdlZTk2OWQzNG
2018-11-01 11:55:26.222 : Request: ¦ I0Njc2N2YyM2M5IiwiaWF0IjoxNTQxMDYyNDc5fQ.1wO1CYy5M-xJXOHz7pZ5-qRYbO87WZ1Ji5JE7SUr6Vc
2018-11-01 11:55:26.223 : Request: ¦

2018-11-01 11:55:26.224 : Request: ¦ Omitted request body
2018-11-01 11:55:26.224 : Request: +---------------------------------------------------------------------------------------
2018-11-01 11:55:26.290 : Response: +------ Response -----------------------------------------------------------------------
2018-11-01 11:55:26.291 : Response: ¦ /socket.io/ - is success : true - Received in: 64ms
2018-11-01 11:55:26.292 : Response: ¦
2018-11-01 11:55:26.293 : Response: ¦ Status Code: 200 / OK
2018-11-01 11:55:26.295 : Response: ¦
2018-11-01 11:55:26.297 : Response: ¦ Headers:
2018-11-01 11:55:26.297 : Response: ¦ + Access-Control-Allow-Origin: *
2018-11-01 11:55:26.298 : Response: ¦ + Cache-Control: no-cache
2018-11-01 11:55:26.300 : Response: ¦ + Content-Length: 333
2018-11-01 11:55:26.300 : Response: ¦ + Content-Type: text/vnd.wap.wml
2018-11-01 11:55:26.301 : Response: ¦ + Date: Thu, 01 Nov 2018 08:55:26 GMT
2018-11-01 11:55:26.301 : Response: ¦ + Set-Cookie: io=XbkfAUdWipwY_YUsAC2O; Path=/; HttpOnly
2018-11-01 11:55:26.304 : Response: ¦

2018-11-01 11:55:26.304 : Response: ¦ Omitted response body
2018-11-01 11:55:26.305 : Response: +---------------------------------------------------------------------------------------

2018-11-01 11:55:26.313 : .socket.engineio.client.Socket: socket received: type 'error', data 'parser error'
2018-11-01 11:55:26.316 : .socket.engineio.client.Socket: socket error io.socket.engineio.client.EngineIOException: server error
2018-11-01 11:55:26.316 : io.socket.client.Manager: connect_error
2018-11-01 11:55:26.317 : io.socket.client.Manager: cleanup
2018-11-01 11:55:26.320 : io.socket.client.Manager: disconnect
2018-11-01 11:55:26.321 : io.socket.client.Manager: cleanup
2018-11-01 11:55:26.322 : .socket.engineio.client.Socket: socket close with reason: forced close
2018-11-01 11:55:26.323 : neio.client.transports.Polling: transport open - closing
2018-11-01 11:55:26.324 : neio.client.transports.Polling: writing close packet
2018-11-01 11:55:26.325 : o.client.transports.PollingXHR: xhr open POST: http://myserverexample.com/socket.io/?EIO=3&transport=polling
2018-11-01 11:55:26.326 : o.client.transports.PollingXHR: sending xhr with url http://myserverexample.com/socket.io/?EIO=3&transport=polling | data 1:1
2018-11-01 11:55:26.327 : .socket.engineio.client.Socket: socket closing - telling transport to close
2018-11-01 11:55:26.328 : io.socket.client.Manager: disconnect
2018-11-01 11:55:26.328 : io.socket.client.Manager: cleanup
2018-11-01 11:55:26.330 : io.socket.client.Manager: disconnect
2018-11-01 11:55:26.331 : io.socket.client.Manager: cleanup
2018-11-01 11:55:26.331 : io.socket.client.Manager: disconnect
2018-11-01 11:55:26.332 : io.socket.client.Manager: cleanup