[Rendering] Action.Submit of Adaptive card Not Working in MS Teams iOS Mobile App

Target Platforms

iOS

SDK Version

4

Application Name

Microsoft Teams

Problem Description

Action.Submit is not functioning in the Microsoft Teams iOS mobile application. The same functionality works as expected on the following platforms:
Microsoft Teams on Windows PC
Microsoft Teams on iOS PC
Microsoft Teams on Android devices
No iOS-specific or device-specific logic has been implemented. The issue appears to be isolated to the Teams iOS mobile app.

Screenshots

No response

Card JSON

{
                        "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
                        "type": "AdaptiveCard",
                        "version": "1.2",
                        "body": [
                            {
                                "type": "Container",
                                "items": [
                                    {
                                        "type": "ColumnSet",
                                        "columns": [
                                            {
                                                "type": "Column",
                                                "width": "stretch",
                                                "items": [
                                                    {
                                                        "type": "TextBlock",
                                                        "text": "Test Entry",
                                                        "weight": "Bolder",
                                                        "size": "Medium",
                                                        "wrap": true
                                                    },
                                                    {
                                                        "type": "TextBlock",
                                                        "text": "${Entry1}",
                                                        "wrap": true,
                                                        "spacing": "Small"
                                                    },
                                                    {
                                                        "type": "TextBlock",
                                                        "text": "${Answer}",
                                                        "isSubtle": true,
                                                        "spacing": "Small",
                                                        "wrap": true
                                                    }
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ],
                        "actions": [
                            {
                                "type": "Action.Submit",
                                "title": "Summarize",
                                "style": "positive",
                                "data": {
                                    "msteams": {
                                        "type": "imBack",
                                        "value": "Summarize this answer"
                                    }
                                }
                            }
                        ]
                    }

Sample Code Language

No response

Sample Code

No response

Start with the supplied Adaptive Card JSON and compare Action.Submit behavior in Microsoft Teams on iOS mobile against the listed working platforms. The issue provides no sample application, source file, test, or reproduction steps beyond the card payload; done would require identifying and resolving the iOS-specific failure or documenting the external limitation.