Version:
6.3.0
API Subdomain (api/taskrouter/ip_messaging):
twilio.twiml.VoiceResponse

Code Snippet

@app.route('/ivr/welcome', methods=['POST'])
def welcome():
    response = VoiceResponse()
    with response.gather(numDigits=1, action=url_for('menu'), method='POST') as g:
        g.say('Welcome to my IVR system.')
    return twiml(response)

Expected TwiML Response

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Gather action="/ivr/menu" method="POST" numdigits="1">
        <Say>Welcome to my IVR system.</Say>
    </Gather>
</Response>

Actual TwiML Response

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Gather action="/ivr/menu" method="POST" numdigits="1" />
    <Say>Welcome to my IVR system.</Say>
</Response>

Steps to Reproduce

1. Use code provided with appropriate imports
2. Print str(response) to view generated TwiML

More Information

Basically, it appears that when trying to use the say method of gather, instead of nesting the Say verb inside of the Gather, it appends it to the end after the Gather.