Twilio Call hangs up after moving call from one queue to another - queue

Question

When I move a call from one queue to another and then connect to it from an agent, the call hangs up after a few seconds of connection.
Please let me know as to what could be the issue.

Answer 1

Twilio Evangelist here. This should work perfectly, so I suspect you might want to contact Twilio Support (help#twilio.com) with your Twilio Account SID and they can probably check this out for you.
Hope this helps!

Answer 2

Below is sample code to reproduce my issue:
Its implemented using Codeigniter framework.
<?php
class Test_queue extends CI_Controller {
function test()
{
$action = site_url('test_queue/action');
$wait = site_url('test_queue/wait');
echo <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<Response>
<Enqueue method="GET" waitUrlMethod="GET" action="$action" waitUrl="$wait">Queue Demo</Enqueue>
</Response>
XML;
}
function wait()
{
echo <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<Response>
<Say>
You are about to leave queue Queue Demo
</Say>
<Leave />
</Response>
XML;
}
function action()
{
$action = site_url('test_queue/second_action');
$wait = site_url('test_queue/second_wait');
echo <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<Response>
<Enqueue method="GET" waitUrlMethod="GET" action="$action" waitUrl="$wait">Queue Demo1</Enqueue>
</Response>
XML;
}
function second_action()
{
echo <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<Response>
<Hangup/>
</Response>
XML;
}
function second_wait()
{
echo <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<Response>
<Say>
You are in queue Queue Demo1
</Say>
</Response>
XML;
}
function dial()
{
$url = site_url('test_queue/agent_msg');
echo <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<Response>
<Dial method="GET">
<Queue>Queue Demo1</Queue>
</Dial>
</Response>
XML;
}
function agent_msg()
{
echo <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<Response>
<Say>You will now be connected to an agent.</Say>
</Response>
XML;
}
}
Basically, the issue occurred when call moved from first queue to second queue and the agent(Twilio.Device) connected to the call with the dial() function call.
If I provide url parameter for twiML, so that a message is said back, before connecting the caller to agent, the call does not hang up any more.
Below is the working response for dial() function:
$url = site_url('test_queue/agent_msg');
echo <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<Response>
<Dial method="GET">
<Queue url="$url" method="GET">Queue Demo1</Queue>
</Dial>
</Response>
XML;