Hi,
That looks like a bug of Joomla.
But anyways, let's do it the other way then. Edit your related products module via the Joomla modules manager. There, under the "HikaShop options" tab, you'll find an option "menu" which dictates which menu item will be used for the links of that module.
There, either you have the menu with the id 322 selected or you don't have anything selected.
I would recommend you to select a menu item of the type "products listing" or "categories listing" which is accessible to all the user groups and all the languages. Then, make sure that this menu item is also selected in the "menu assignment" of the slider module and it should then dipslay fine when you click on a product link of that related products module.