On iPhone Duo (iOS 27.2, 24B91020), when the device is unfolded, a portrait-only app runs in a centered portrait window. In that window, the trailing bar button items sit about 150pt in from the trailing edge. They should use the standard margin. Folded, the layout is correct. Reproduces with both init(customView:) and image bar button items. The navigation bar spans the full window width (469pt), and the left/right safe area insets are 0. No custom navigation bar layout or appearance code. UIScreen.main.bounds (466x678) differs from the window bounds (469x669). Repro: a UIKit app that supports portrait only, with UIRequiresFullScreen = YES, and a UINavigationController containing a UITabBarController with 3 rightBarButtonItems. Run it on iPhone Duo and unfold the device. Is this a known issue, and is there a workaround?

Trailing bar button items misplaced for portrait-only apps on iPhone Duo (unfolded)

On iPhone Duo (iOS 27.2, 24B91020), when the device is unfolded, a portrait-only app runs in a centered portrait window. In that window, the trailing bar button items sit about 150pt in from the trailing edge. They should use the standard margin. Folded, the layout is correct.

Reproduces with both init(customView:) and image bar button items.
The navigation bar spans the full window width (469pt), and the left/right safe area insets are 0.
No custom navigation bar layout or appearance code.
UIScreen.main.bounds (466x678) differs from the window bounds (469x669).

Repro: a UIKit app that supports portrait only, with UIRequiresFullScreen = YES, and a UINavigationController containing a UITabBarController with 3 rightBarButtonItems. Run it on iPhone Duo and unfold the device.

Is this a known issue, and is there a workaround?