Cached app previews in “task manager”

Hello guys! Do you know that iphone can show the previous landscape appearance of some of the apps in the task manager and you can see what was there even if app currently shows something else? Steps: 1 Open some sensitive data in the landscape mode (private photos in finder). 2 Swipe up to hide the app. 3 Switch to the portrait mode 3 Open something else in a portrait mode. 4 Switch to the app with the sensitive data in the portrait mode and navigate away from the sensitive data (say leave the folder that has the sensitive data). 5 Open something else in the landscape mode. 6 Open task manager in the portrait mode. ->. Actual result: You can see a preview of the landscape-mode-app content(private photos). -> Expected result: task manager shows a preview of the current state of the app(at least rotated portrait mode preview). Not sure it’s critical but for me is a bit unusual. Somebody who got your iphone just to make a call with your permission can accidentally or intentionally wiew your sensitive data.