Fixed Player Start labels not being updated with repeat map generations (bug #20036)

changelog

@@ -9,6 +9,8 @@ Version 1.12.4+dev:
    * Add Recent Files menu with a list of recently saved or loaded maps or
      scenarios, up to a custom limit (by default 10) that can be set in
      Advanced Preferences.
+   * Fixed Player Start labels not being updated with repeat map generations
+     (bug #20036)
  * Language and i18n:
    * Updated translations: French, Hungarian, Japanese, Latvian
    * Fixed crashes during start-up on Windows resulting from add-ons containing

src/editor/map/context_manager.cpp

@@ -705,6 +705,7 @@ void context_manager::generate_map_dialog()
 		} else {
 			editor_map new_map(game_config_, map_string);
 			editor_action_whole_map a(new_map);
+			get_map_context().set_needs_labels_reset();		// Ensure Player Start labels are updated together with newly generated map
 			perform_refresh(a);
 		}
 	}