Android app leaks note content in Recents/App Switcher preview

[harmpert]

When the Android app is sent to the background while a note is open, the system-level "Recents" app switcher preview shows a screenshot of the last visible screen, including full note content. The app's Passcode Lock only re-engages once the app regains focus — but the preview snapshot is generated at the moment the app is backgrounded, before the lock triggers. This means unencrypted note content is briefly (and sometimes persistently, until overwritten by a new preview) visible in the OS-level app switcher, even with Passcode Lock and Auto Lock enabled.

Could the Android app apply WindowManager.LayoutParams.FLAG_SECURE to note-viewing/editing screens? This is the standard approach used by banking and password manager apps to blank out the app switcher preview and block screenshots/screen recording of sensitive screens. It would close a real gap for anyone relying on the local passcode as protection against casual access (e.g. a shared device, or someone briefly picking up the phone).