Stream management acknwledgement not working with socket

[SaqibJamil7866]

Stream management acknwledgement not working with socket other chat is working fine with socket. Its was working fine with bosh. I just change the connection from bosh to socket.
Here is the line of code change
Socket connection(chat is working fine but Stream management acknwledgement is not working)
$scope.xmppChatObj.connection = new Strophe.Connection("wss://testchatnet-web.ethizo.com:5445/ws/");

Bosh connection (Working fine)
$scope.xmppChatObj.connection = new Strophe.Connection($scope.xmppChatObj.boshServer,{ 'keepalive': true });