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Vapi AI

I'm using this to enable ssml parsing. 
  "voice": {
    "model": "eleven_turbo_v2_5",
    "voiceId": "AkxsbbnvuvZZmyLQ40sj",
    "provider": "11labs",
    "stability": 0.5,
    "similarityBoost": 0.75,
    "enableSsmlParsing": true
  },
When I publish the prompt, it seems to revert back to: 

  "voice": {
    "model": "eleven_turbo_v2_5",
    "voiceId": "AkxsbbnvuvZZmyLQ40sj",
    "provider": "11labs",
    "stability": 0.5,
    "similarityBoost": 0.75,
    "inputPunctuationBoundaries": [
      "||"
    ]
  },

Is anyone else experiencing this? is there a workaround?