problem in display discount in list products

-- url of the page with the problem -- : vtextra.com
-- HikaShop version -- : 3.1.1
-- Joomla version -- : 3.7

Hi,
just add some discount.
In product list linked to menu voice MODULES I can't see this discount, that I can see if I click on product.
In setting in menu I've been set to show discount.
Any ideas?