[Rendering][iOS] Default value of the Input.ChoiceSet not taken into account

Target Platforms

iOS

SDK Version

1.5

Application Name

Microsoft Teams

Problem Description

When using Input.ChoiceSet with Expanded style, and setting a Default value with the "value" field, it renders correctly and gets ticked on Teams native app, all the browser and on Android. On iOS it does not render as expected, i.e. the default value is not pre-selected.

Screenshots

Actual image sample:

JSON sample provides simplified adaptive card.

Card JSON

{
    "type": "AdaptiveCard",
    "$schema": "https://adaptivecards.io/schemas/adaptive-card.json",
    "version": "1.5",
    "body": [
        {
            "type": "Input.ChoiceSet",
            "label": "New Input.ChoiceSet",
            "choices": [
                {
                    "title": "Choice 1",
                    "value": "value1"
                },
                {
                    "title": "Choice 2",
                    "value": "value2"
                },
                {
                    "title": "Test"
                }
            ],
            "placeholder": "Placeholder text",
            "style": "expanded",
            "value": "Test"
        }
    ]
}

Sample Code Language

No response

Sample Code

No response

Start with the provided Adaptive Card JSON and trace the iOS rendering path for the expanded Input.ChoiceSet. Compare its default-value handling with the browser and Android behavior described in the issue. Done means the choice matching the value field is pre-selected on iOS.