Can't stream bytes of audio from pyaudio

Question

I have this program that streams bytes from the audio that my microphone gets through pyaudio, but i have a problem, is that i send this bytes to a flask webapp where i receieve it and decode since it first it's encoded to base64, but when i try to play the audio it doesn't play at all

Here are the python-bytes with the failing wav

Here are the python-bytes that work correctly

Here it is the python code that receives the data sent from another program that i made

@app.route('/api/audio', methods=['POST', 'GET'])
def apiaudio():
stream = b64.b64decode(request.data)
def sound():
    wav_header = genHeader(RATE, 16,CHANNELS)
    data = wav_header
    data += stream
    with open('readme.txt', 'w') as f:
        f.write(str(data))
    yield(data)
    while True:
        data = stream
        yield(data)
return(Response(sound(), mimetype="audio/x-wav"))