Instead of showing the same product multiple times, expose your customers to more products.
If multiple products share a parent_product_id, only the first product displays within the content. For example, a template has a grid for cart abandoned products and a second grid for recommended products. If Product A qualifies for both grids, it displays only in the first grid (cart abandonment). If Product B shares the same parent_product_id as Product A, then Product B does not display in either grid.
To display products only once in dynamic grids used in the content, go to Container > Details and enable Remove Duplicate Products.