Z1627288647207 , via OnePlus Nord 2 , Dec 2, 2021 : Recently I am seeing this issue on my phone. When I open what's app to see status sometime it closes the app. Then I have to open it again. Even it happened with file manager, and some other apps too. It just goes black then I need to click back or go to main homescreen. And even notification bar disappears while trying access it when app is frozen. Except back or turning off the screen and checking will only work.