I have a problem with Drupal 7's dropdown menu. I have two sites, one for production and one for testing. Both sites are more and less the same, but in production we have made some modules and core update. In the testing sites I've created the submenus and the main link and I checked the "Show as expanded" checkbox in menu configuration. This works fine creatint the dropdown menu without problems: In the image you can see that it adds the classes dropdown, radix-dropdown-processed and dropdown-menu without problems.
What could be the problem? any ideas will be appreciated!