iPadOS 27 breaks AirPlay presentations when switching apps

In iPadOS 27, switching apps during an AirPlay presentation mirrors the entire iPad screen to the external display, exposing private notes and windows. The behavior occurs with or without Stage Manager, and Apple has not shipped a fix.

• Switching apps during AirPlay now mirrors the whole iPad screen instead of the presentation
• The issue reproduces with multiple windows open, with or without Stage Manager
• Keynote exits the presentation entirely; PowerPoint requires a restart
• iPadOS 26 let users hand off control by swiping up and picking an app from the Dock