fix

Author: markdevocht

ios/BottomTabPresenter.mm

@@ -38,7 +38,10 @@ - (void)mergeOptions:(RNNNavigationOptions *)mergeOptions
 
 - (void)createTabBarItem:(UIViewController *)child
         bottomTabOptions:(RNNBottomTabOptions *)bottomTabOptions {
-    child.tabBarItem = [_tabCreator createTabBarItem:bottomTabOptions mergeItem:child.tabBarItem];
+    UITabBarItem *updatedItem = [_tabCreator createTabBarItem:bottomTabOptions mergeItem:child.tabBarItem];
+    if (updatedItem != child.tabBarItem) {
+        child.tabBarItem = updatedItem;
+    }
 }
 
 @end

ios/RNNTabBarItemCreator.mm

@@ -5,7 +5,7 @@
 @implementation RNNTabBarItemCreator
 
 - (UITabBarItem *)createTabBarItem:(UITabBarItem *)mergeItem {
-    return [UITabBarItem new];
+    return mergeItem ?: [UITabBarItem new];
 }
 
 - (UITabBarItem *)createTabBarItem:(RNNBottomTabOptions *)bottomTabOptions