[Accessibility - AdaptiveActionSet] Element must only use allowed ARIA attribute. ARIA attribute is not allowed: aria-expanded="true"

Target Platforms

Other

SDK Version

1.4

Application Name

Microsoft Teams, PowerApps Cards

Problem Description

There is an accessibility bug when the AdaptiveActionSet that is expandable gets expanded.

Element must only use allowed ARIA attribute. ARIA attribute is not allowed: aria-expanded="true"

Screenshots

Card JSON

{
    "type": "AdaptiveCard",
    "version": "1.4",
    "body": [
      {
        "type": "ColumnSet",
        "columns": [
          {
            "type": "Column",
            "width": "stretch",
            "items": [],
            "spacing": "none"
          },
          {
            "type": "Column",
            "width": "auto",
            "items": [
              {
                "type": "Image",
                "url": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAABmJLR0QA/wD/AP+gvaeTAAAAQ0lEQVQ4je3Nuw0AIAxDQYs9oLD3H4hpTAuIgk9DkSufIgcI4UMkC8ly0wAgzUe2q+0qKZ+05WDHD20kKc9fd1sIv2iTNSNgsXCyPwAAAABJRU5ErkJggg==",
                "selectAction": {
                  "type": "Action.ToggleVisibility",
                  "targetElements": [
                    "systemMenu"
                  ]
                },
                "altText": "Action Items",
                "width": "16px"
              }
            ],
            "verticalContentAlignment": "bottom",
            "spacing": "none"
          }
        ],
        "spacing": "none"
      },
      {
        "id": "systemMenu",
        "type": "ActionSet",
        "actions": [
          {
            "type": "Action.Execute",
            "associatedInputs": "none",
            "verb": "about",
            "title": "About"
          },
          {
            "type": "Action.Execute",
            "associatedInputs": "none",
            "verb": "flush",
            "title": "Flush"
          },
          {
            "type": "Action.Execute",
            "associatedInputs": "none",
            "verb": "show",
            "title": "Refresh"
          }
        ],
        "isVisible": false
      },
      {
        "type": "TextBlock",
        "id": "textLabel1",
        "size": "medium",
        "weight": "bolder",
        "text": "Your card title goes here"
      },
      {
        "type": "TextBlock",
        "id": "textLabel2",
        "text": "Add and remove element to customize your new card.",
        "wrap": true
      },
      {
        "type": "TextBlock",
        "text": "ab4948e5-3128-4d07-81fd-239695c1a67c",
        "isVisible": false
      }
    ],
    "refresh": {
      "action": {
        "type": "Action.Execute",
        "associatedInputs": "none",
        "verb": "show",
        "title": "Refresh"
      }
    },
    "debug": {
      "main": "main"
    },
    "msteams": {
      "width": "Full"
    }
  }

Sample Code Language

No response

Sample Code

No response

Start with the expandable AdaptiveActionSet behavior using the supplied Adaptive Card JSON and reproduce the accessibility error when it expands. Trace where aria-expanded="true" is produced, then verify that the expanded card no longer reports an invalid ARIA attribute in the accessibility check.