Error with message extension on iOS only.

Nivedipa-MSFT 

Sorry, I am not good at English, so I may not be able to communicate well...

HeroCard is not involved.

Teams for iOS Message Extension -> choiceset window[send request to azure bot] -> Azure BOT [Error occurs!!] -> return HeroCard to Teams

The json(RequestBody) sent by Teams for iOS to the BOT in the background is wrong.

The json of the messagePayload of the RequestBody is as follows.

#Teams for Windows

"messagePayload": {
  "attachments": [],
  "body": {
    "content": "hoge",
    "contentType": "html"  },
  "createdDateTime": "2023-02-02T02:09:25.773Z",
  "deleted": false,
  "from": {
    "user": {
      "userIdentityType": "aadUser",
      "displayName": "xxxxxxx",
      "id": "xxxxxx"    }
  },
  "id": "xxxxxxxxxx",
  "importance": "normal",
  "linkToMessage": "xxxxxxxxx",
  "locale": "ja-JP",
  "mentions": [],
  "reactions": [
    {
      "createdDateTime": "2023-02-02T02:09:44.835Z",
      "reactionType": "laugh",
      "user": {
        "user": {
          "userIdentityType": "aadUser",
          "displayName": "xxxxxx",
          "id": "xxxxxxxxx"        }
      }
    }
  ],
  "subject": ""}

#Teams for iOS

"messagePayload": {
    "body": {
        "contentType": "html",
        "content": "hoge"    },
    "id": xxxxxxxx,
    "reactions": [
        {
            "reactionType": [
                "laugh"            ],
            "user": {
                "conversation": "",
                "device": "",
                "application": "",
                "user": {
                    "userIdentityType": "aadUser",
                    "id": "xxxxxxxx",
                    "displayName": "xxxxxxxx"                }
            },
            "createdDateTime": "2023-02-02T02:09:44.835Z"        }
    ],
    "linkToMessage": "xxxxxxxx",
    "replyToId": xxxxxxxx,
    "subject": "",
    "from": {
        "conversation": "",
        "device": "",
        "application": {},
        "user": {
            "userIdentityType": "aadUser",
            "id": "xxxxxxxx",
            "displayName": "xxxxxxxx"        }
    },
    "createdDateTime": "2023-02-02T02:09:25.773Z",
    "locale": "ja-jp-jp",
    "importance": "",
    "summary": null,
    "deleted": "false",
    "mentions": [],
    "attachments": [],
    "lastModifiedDateTime": ""}

 Only when message extensions are used for messages that have reactions in iOS, reactionType is array of string.