Hi,
So I did some extensive debug with what I had access to on your website and the issue is not in HikaShop, as expected.
It's the plugin "HikaShop integration with Cherry Picker" which changes dynamically the MySQL query loading the products of that module even though it shouldn't change any product loading MySQL query when the current page is not a products listing page.
You can easily test this by disabling the plugin and you'll see that the products display properly on the page while it doesn't with the plugin activated.
So this will require some patch in that plugin.
I invite you to contact the support of that plugin so that they can fix that (or maybe it is already fixed and you need to update that extension).