Worked on the microsoft/Teams-AdaptiveCards-Mobile repository to enhance mobile rendering stability for Adaptive Cards by addressing a regression in the Column Set Renderer. Focused on UI/UX design and iOS development using Objective-C, the work involved reverting a high-priority width constraint change to restore correct layout behavior when columns are hidden. This targeted fix reduced layout regressions across iOS and Android platforms, ensuring consistent user experience in dynamic column scenarios. By delivering a regression-safe solution with minimal code changes, the developer helped maintain UI consistency in Teams Mobile and reduced support overhead related to layout issues in adaptive card rendering.