Screen flickers on the app after waking up from screen saver in Android

In Android, when I wake up the device from screensaver, I see the screen flickers momentarily before displaying the GUI.

Steps to reproduce:
1. On an Android device, install any Qt app (simple app using QtCreator).
2. Make sure screen lock is disabled.
3. Run the app and go to screen saver.
4. Touch on the screen and will observe the screen flashes for a brief moment before displaying the GUI.