diff --git a/lib/ansible/plugins/strategy/__init__.py b/lib/ansible/plugins/strategy/__init__.py
index 38917c8b588..7ff1491d75b 100644
--- a/lib/ansible/plugins/strategy/__init__.py
+++ b/lib/ansible/plugins/strategy/__init__.py
@@ -624,9 +624,6 @@ class StrategyBase:
         group_name = result_item.get('add_group')
         new_group = self._inventory.get_group(group_name)
         if not new_group:
-            # clear cache of group dict, which is used in magic host variables
-            self._inventory.clear_group_dict_cache()
-
             # create the new group and add it to inventory
             new_group = Group(name=group_name)
             self._inventory.add_group(new_group)
@@ -640,6 +637,10 @@ class StrategyBase:
         if group_name not in host.get_groups():
             new_group.add_host(real_host)
             changed = True
+            
+        if changed:
+            # clear cache of group dict, which is used in magic host variables
+            self._inventory.clear_group_dict_cache()
 
         return changed