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A comment on Android phones are sending significant amount of user data with no opt-out [pdf]. Parent comment

Re:Android phones are sending significant amount of user dat... by interpol_p on Wednesday October 13, 2021 @02:30AM (#28848864)
If the app is using the Background App Refresh entitlements [1] (Background fetch / background processing) then it is possible for iOS to update the screenshot for the app switcher periodically even when the app is in the background

Messages does this, as you will notice that an active conversation tends to be up-to-date in the app switcher

[1] https://developer.apple.com/documentation/uikit/app_and_envi...

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