fix: fix stack nested in tab always getting reset

packages/stack/src/navigators/createStackNavigator.tsx

@@ -45,14 +45,12 @@ function StackNavigator({
     () =>
       navigation.addListener &&
       navigation.addListener('tabPress', (e: EventArg<'tabPress'>) => {
+        const isFocused = navigation.isFocused();
+
         // Run the operation in the next frame so we're sure all listeners have been run
         // This is necessary to know if preventDefault() has been called
         requestAnimationFrame(() => {
-          if (
-            state.index > 0 &&
-            navigation.isFocused() &&
-            !e.defaultPrevented
-          ) {
+          if (state.index > 0 && isFocused && !e.defaultPrevented) {
             // When user taps on already focused tab and we're inside the tab,
             // reset the stack to replicate native behaviour
             navigation.dispatch({