title: Dialogflow Messenger List Response Type Issue
body: <p>I am using Dialogflow Messenger's <code>list response type</code> for a list of 8 services people can select from.</p>
  <p>Can Dialogflow not handle more than 3 clicks in the list?</p>
  <p><strong>Click service 1:</strong> fires fine.</p>
  <p><strong>Click service 2:</strong> fires fine.</p>
  <p><strong>Click service 3</strong> or after that: &quot;I don't understand.&quot;</p>
  <p>However, people can type in the service and the bot responds just fine. Or people can click 1 service, ask the question again and select a different service and the bot responds fine. But we want people to be able to click all the services in the whole list.</p>
  <p><a href="https://i.stack.imgur.com/yt9Az.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yt9Az.jpg" alt="enter image description here" /></a></p>
  <p>Code used:</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>{
    "richContent": [
      [
        {
          "type": "list",
          "event": {
            "parameters": {},
            "name": "Fire-Application-Development-Intent",
            "languageCode": ""
          },
          "title": "Application Development"
        },
        {
          "title": "Business Intelligence",
          "event": {
            "name": "Fire-Business-Intelligence-Intent",
            "languageCode": "",
            "parameters": {}
          },
          "type": "list"
        },
        {
          "type": "list",
          "title": "Digital Assistants (AI)",
          "event": {
            "parameters": {},
            "languageCode": "",
            "name": "Fire-Digital-Assistants-Intent"
          }
        },
        {
          "type": "list",
          "title": "Mobile Development",
          "event": {
            "languageCode": "",
            "parameters": {},
            "name": "Fire-Mobile-Development-Intent"
          }
        },
        {
          "event": {
            "languageCode": "",
            "parameters": {},
            "name": "Fire-Websites-Intent"
          },
          "title": "Websites",
          "type": "list"
        },
        {
          "type": "list",
          "title": "ChatBeacon",
          "event": {
            "name": "Fire-ChatBeacon-Intent",
            "languageCode": "",
            "parameters": {}
          }
        },
        {
          "title": "Asset Location Tracking",
          "event": {
            "languageCode": "",
            "parameters": {},
            "name": "Fire-Asset-Location-Tracking-Intent"
          },
          "type": "list"
        },
        {
          "event": {
            "name": "Fire-NRS-Forms-Intent",
            "languageCode": "",
            "parameters": {}
          },
          "type": "list",
          "title": "NRS Forms"
        }
      ]
    ]
  }</code></pre>
  </div>
  </div>
  </p>