Why does a React Native app freeze?

Question

React Native

I am writing the first application in react native, I created a websocket server, I receive data once a minute, everything seems to work fine, but then the application freezes and I can’t return to the main page
. Here is the server code:

io.on("connection", socket => {
  console.log(`Connected: ${socket.id}`);

  socket.on('disconnect', () => console.log(`Disconnected: ${socket.id}`));

  async function requestMain(){
    var result = await mainFunction();
    await socket.emit("info", result);
    setTimeout(requestMain, 60000);
  };
  requestMain();
});

server.listen(port, () => {
  console.log(`Example app listening at http://localhost:${port}`);
});

Here is the code with react native :

var socket;
const [isLoading, setLoading] = useState(true);
const [data, setData] = useState([]);

useEffect(() => {
   socket = io("http://example/", {
       transports: ['websocket']
   });

   socket.on("info", info => {
      setData(info);
      setLoading(false);
   });

   return () => {
      socket.disconnect();
   };
}, [isLoading]);
//Далее идет парсинг JSON строки и строится DOM

Most likely I didn’t understand useEffect, what could be the problem?