Sub-menu items are broken on multilingual sites in several of your free and paid templates

Hello. There is a problem with sub-menu items only being displayed properly on single language websites. On multilingual sites we use separate menu modules for each language and sub-menu items are only displayed if you are on the parent page (menu item type is set to "article") but not when you are elsewhere on the site and not if the parent menu item type is URL, Menu Heading or Separator. This problem presents in RSJuno!, RSVario! and the newly released RSTrone! all installed on Joomla 3.8.7 running on PHP 7.0, 7.1 and even 7.2. Just follows the official Joomla's guide to create a simple multilingual website and create two menus with some sub-items to see the problem.