Adaptive Card layout breaks on iOS Teams – Input.Number inside ColumnSet renders incorrectly

Target Platforms

iOS

SDK Version

N/A – Adaptive Card JSON sent via backend (Python) and rendered in Microsoft Teams client

Application Name

Progress Maker App

Problem Description

We are experiencing a layout issue with Adaptive Cards when rendered in Microsoft Teams on iOS devices.

The same Adaptive Card renders correctly on:

Microsoft Teams Desktop (Windows/Mac)
Microsoft Teams Android app

However, on iOS (iPhone), the layout breaks — specifically, input fields (Input.Number) inside a ColumnSet do not align horizontally and instead shift vertically or overlap, causing UI inconsistency.

Expected Behavior

All columns (Start, Current, Updated, Target) should render in a single row with proper alignment, similar to Desktop and Android views.

Actual Behavior (iOS)
Input fields move below their intended columns
Column alignment is broken
Card appears stacked instead of grid-like
Layout becomes difficult to use

Screenshots

Card JSON

{ "type": "AdaptiveCard", "version": "1.5", "body": [ { "type": "ColumnSet", "columns": [ { "type": "Column", "width": "stretch", "items": [{ "type": "TextBlock", "text": "Start" }] }, { "type": "Column", "width": "stretch", "items": [{ "type": "TextBlock", "text": "Current" }] }, { "type": "Column", "width": "stretch", "items": [ { "type": "Input.Number", "id": "updatedValue", "value": "4" } ] }, { "type": "Column", "width": "stretch", "items": [{ "type": "TextBlock", "text": "Target" }] } ] } ] }

Sample Code Language

Python

Sample Code

No response

Start by reproducing the provided Adaptive Card JSON in Microsoft Teams on an iPhone, then compare its layout with the desktop and Android results. The issue does not name an AdaptiveCards source file or test, so identify the iOS rendering entry point and add coverage for Input.Number inside a four-column ColumnSet. Done means the columns remain aligned horizontally on iOS without affecting the other clients.