The useEffect returned function never called while App closes

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I am removing some values when app closes, and I am doing it with useEffect but it does not works.

export default RootComponent = ()=> {

useEffect(()=> {

   return ()=> {

     // on Android 10 Galaxy A60: this function never invoked, when app closes 
     // on Android 6 Galaxy note9 clone: this function invoked, when app closes

   }

}, []);

return (
 // ...
);

} 
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