iOS - Security - App content is 100% visible for a moment before the app lock screen appears

[marinofaggiana]

Actions Performed
Logged in

1. Open the app
2. Go to the app tab More
3. Open Settings
4. Activate the PIN lock protection for the app
5. Navigate to documents and open any document with some content
6. Send app to background
7. Wait a while
8. Open the app

Expected Result
No access to app content for unauthorized users

Actual Result
The app content, for example the currently opened document, or the overview page like image gallery etc., is 100% visible for a moment before the app lock screen appears. It is also possible to screenshot or screencast the content in this moment

https://support.nextcloud.com/#ticket/zoom/80880