I am building a website based on web socket communication. Its is working fine until iOS 14 but started breaking from iOS 15. Web socket java script client is able to open connection to server, but upon trying to send a message, the connection is getting closed. Following is my html and JS code.

function start_websocket() {
  connection  = new WebSocket("wss://localhost/wss/");
  connection.onopen = function () {
    console.log('Connection Opened');        
  };
  connection.onerror = function (error) {
    console.log('WebSocket Error ' + error);
  };
  connection.onclose = function(){
    console.log("Closed");
  };
  connection.onmessage = function (e) {
    console.log("Message Received :" + e.data);
  };
 }

function myFunction() {
   var testText = document.getElementById("testText");
   if (testText.value != "" && connection.readyState === connection.OPEN) {
      connection.send("Test");
   }
}
start_websocket();

myFunction() is an on-click event of a button.

A Java Websocket server is used, which will decode and send the messages based on the Data framing in https://datatracker.ietf.org/doc/html/rfc6455#section-5.

Saw different articles on the Web, but didn't found a solution to this issue. Any suggestions are much appreciated. Looking forward for your answers

Thanks in advance.