fix(ScreenContainer): prevent blank-screen flash during rapid tab switching with animation

android/src/main/java/com/swmansion/rnscreens/ScreenContainer.kt

@@ -385,8 +385,17 @@ open class ScreenContainer(
                         "fragment manager is null when performing update in ScreenContainer"
                     }.fragments,
                 )
+
+            // When activityState is driven by Animated.Value interpolations (as react-navigation
+            // does for tab animations), each screen's value updates independently, frame by frame.
+            // Rapid tab switching can create a transient window where ALL screens are inactive
+            // simultaneously — the leaving screen crossed the threshold while the arriving one
+            // has not yet risen above it. Only detach when at least one screen remains visible.
+            val hasVisibleScreen = screenWrappers.any { getActivityState(it) !== ActivityState.INACTIVE }
+
             for (fragmentWrapper in screenWrappers) {
-                if (getActivityState(fragmentWrapper) === ActivityState.INACTIVE &&
+                if (hasVisibleScreen &&
+                    getActivityState(fragmentWrapper) === ActivityState.INACTIVE &&
                     fragmentWrapper.fragment.isAdded
                 ) {
                     detachScreen(it, fragmentWrapper.fragment)

ios/RNSScreenContainer.mm

@@ -160,8 +160,23 @@ - (void)updateContainer
   BOOL screenRemoved = NO;
   // remove screens that are no longer active
   NSMutableSet *orphaned = [NSMutableSet setWithSet:_activeScreens];
+
+  // When activityState is driven by Animated.Value interpolations (as react-navigation does
+  // for tab animations), each screen's value updates independently, frame by frame. Rapid tab
+  // switching can create a transient window where ALL screens are inactive simultaneously —
+  // the leaving screen has already crossed the threshold while the arriving screen has not yet
+  // risen above it. Only detach when at least one screen remains visible to avoid a blank flash.
+  BOOL hasVisibleScreen = NO;
+  for (RNSScreenView *screen in _reactSubviews) {
+    if (screen.activityState != RNSActivityStateInactive) {
+      hasVisibleScreen = YES;
+      break;
+    }
+  }
+
   for (RNSScreenView *screen in _reactSubviews) {
-    if (screen.activityState == RNSActivityStateInactive && [_activeScreens containsObject:screen]) {
+    if (hasVisibleScreen && screen.activityState == RNSActivityStateInactive &&
+        [_activeScreens containsObject:screen]) {
       screenRemoved = YES;
       [self detachScreen:screen];
     }