Core/Entities: add extra use of UPDATETYPE_CREATE_OBJECT2 (#20955)

(cherry picked from commit 51c4196acf)

src/server/game/Maps/Map.cpp

@@ -728,7 +728,9 @@ bool Map::AddToMap(T* obj)
 
     //something, such as vehicle, needs to be update immediately
     //also, trigger needs to cast spell, if not update, cannot see visual
+    obj->SetIsNewObject(true);
     obj->UpdateObjectVisibilityOnCreate();
+    obj->SetIsNewObject(false);
     return true;
 }