Adpative card version 1.5 Table is not rendering in WebChat

Is it an issue related to Adaptive Cards?

Yes, this is an Adaptive Card issue, however it only repro on Web Chat.

Is this an accessibility issue?

No

What version of Web Chat are you using?

Latest production

Which distribution are you using Web Chat from?

Bundle (webchat.js)

Which hosting environment does this issue primarily affect?

Web apps

Which browsers and platforms do the issue happened?

No response

Which area does this issue affect?

Attachment: Adaptive Card

What is the public URL for the website?

No response

Please describe the bug

Tables are a feature that surfaced in adaptive card version 1.5. But they are not rendering in WebChat. They also do not work in Test in WebChat, Emulator or Composer.

Below is the sample JSON structure of the adaptive card.

Do you see any errors in console log?

No response

How to reproduce the issue?

Test by sending above adaptive card using type Table.

What do you expect?

To render card and table correctly.

What actually happened?

Web Chat and Test in Web Chat give a friendly error:

Emulator and Composer give an empty response:

Do you have any screenshots or recordings to repro the issue?

No response

Adaptive Card JSON

{
  "type": "AdaptiveCard",
  "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
  "version": "1.5",
  "body": [
    {
      "type": "Table",
      "columns": [
        {
          "width": 1
        },
        {
          "width": 1
        },
        {
          "width": 1
        }
      ],
      "rows": [
        {
          "type": "TableRow",
          "cells": [
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "11",
                  "wrap": true
                }
              ]
            },
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "111",
                  "wrap": true
                }
              ]
            },
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "1111",
                  "wrap": true
                }
              ]
            }
          ]
        },
        {
          "type": "TableRow",
          "cells": [
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "22",
                  "wrap": true
                }
              ]
            },
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "222",
                  "wrap": true
                }
              ]
            },
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "2222",
                  "wrap": true
                }
              ]
            }
          ]
        },
        {
          "type": "TableRow",
          "cells": [
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "33",
                  "wrap": true
                }
              ]
            },
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "333",
                  "wrap": true
                }
              ]
            },
            {
              "type": "TableCell",
              "items": [
                {
                  "type": "TextBlock",
                  "text": "3333",
                  "wrap": true
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}

Additional context

Does not reproduce in Adaptive Cards Designer.