Bug at merging Simple Responses from multiple webhook requests

[kgass]

When calling the webhook multiple times in one scene and sending simple responses there is a bug at merging the simple responses.

prompt from the first webhook call

{
    "override": false,
    "firstSimple": {
        "speech": "<speak><audio src=\"https://www.example.com/audio/file1.mp3\"></speak>",
        "text": "Text 1"
    }
}

prompt from the second webhook call

{
    "override": false,
    "firstSimple": {
        "speech": "<speak><audio src=\"https://www.example.com/audio/file2.mp3\"></audio> <audio src=\"https://www.example.com/audio/file3.mp3\"></audio></speak>",
        "text": " Text 2"
    }
}

merged prompt in the response send to the user

{
    "firstSimple": {
        "speech": "<speak><speak><audio src=\"https://www.example.com/audio/file1.mp3\"></speak> <audio src=\"https://www.example.com/audio/file2.mp3\"/> <audio src=\"https://www.example.com/audio/file3.mp3\"/></speak>",
        "text": "Text 1 Text2"
    }
}

So with the two speak tags the SSML is invalide and is not spoken out. Sometimes the speech object is completely missing.

[kgass]

So found out that the merging Bug is related to invalid SSML. Unfortunately there is no error message from Google for SSML errors.

And as a workaround for the problem that the speech object is completely missing I changed conv.add(new Simple('Text')) to conv.prompt.firstSimple = new Simple('Text') or conv.prompt.lastSimple = new Simple('Text')