When a payment confirmation notification arrives and the user taps the APPROVE action during or immediately before a fold transition, what are the risks to transaction integrity?

Wrong data displayed after fold? Cell reference lost during fold animation? Carousel position jumps after unfold?

"When handling deeplinks from notifications or widgets on Apple Duo, how should the fold state affect deeplink execution? Should a deeplink arriving during fold be executed immediately or queued until fold completes? Can pending deeplinks be interrupted if a fold occurs during navigation? Should navigation state be restored after the device unfolds?"

For banking apps that blur/mask sensitive data when backgrounded, how should this work on Duo when both screens are potentially visible? Should blur behavior differ between active/inactive screens in split view? How to handle data masking during fold transitions?

How should existing UlNavigationController-based applications adapt their navigation hierarchy for iPhone Duo without rebuilding the navigation architecture?

For applications displaying sensitive information, are there any new privacy or security considerations on iPhone Duo, particularly around multitasking, snapshots, screen transitions, or content visibility?

For a large production UIKit application with many legacy screens, would you recommend a gradual screen-by-screen adoption strategy for iPhone Duo, or is there an application-level adaptation that should be implemented first?

For UIKit applications, is UISplitViewController still the recommended architecture for taking advantage of the Duo form factor, or are there newer APIs/patterns (window groups, scene fragments, adaptive layouts) you recommend for dual-screen support?

"How does the app handle fold state during background transitions and foreground launch on Apple Duo? If the device folds while the app is being moved to the background, does the app save the fold state in the scene state data? When the app returns to the foreground, should the fold state be restored to accurately recreate the UI? If a user opens the app via a notification action while the device is already folded, how should the initial view layout be determined? Should SceneDelegate handle fold state transitions during scene lifecycle events (willResignActive, didBecomeActive)?"

When device folds/unfolds, how should interactive component states (animations, selections, playback, expansions) behave? Should state persist, reset, or pause?

How should infinite carousel and cell reusability behave during fold transitions? Is scroll position preserved during fold? If fold occurs during cell reuse, can wrong campaign be displayed? Can "load more" pagination trigger twice during fold? If swipe gesture is mid-progress during fold, can cell snap to wrong position? Can carousel animation glitch during fold? Can cell deallocation fail during fold (memory leak)?

How should deep links and external URL navigation behave when fold transitions occur on Apple Duo?

How should form transactions handled within embedded WebView behave during Apple Duo fold transitions?

"How should bottom sheets behave on Apple Duo during fold? Should bottom sheets be automatically dismissed when fold occurs? Can bottom sheets be opened while the device is in a folded state? What should happen if the sheet content overlaps with the fold line? Should bottom sheet height be different for folded vs unfolded states?"

How do scheduled campaign reminder notifications behave on Apple Duo during fold transitions? If a scheduled notification is triggered while the device is in a folded state, does the notification display correctly? Should we implement fold-aware notification scheduling? Can the notification payload be corrupted or truncated if fold occurs during the notification delivery process? Should we validate notification data after fold transitions? Is the notification center accessible and visible to the user during a folded state? Can the user interact with notification actions during fold? If the device unfolds after a scheduled reminder was set to trigger during the fold, will the notification still be delivered, or could it be skipped? Should we implement retry logic for missed notifications?