Pluggin doesn’t add correctly all the items in the cart after doing it correctly on the product page

Good morning

We have a problem with the bopo plugin.

We have configured a box of 4 items and in principle adds the price of the four products correctly, but when we get to the cart page the price of the last product is not added and only adds the price of the first three products, although the fourth product still appears.

We have tested with boxes of three and five items and it works correctly if we add all the items. In the 5-item box, if I only add 4 items, it does not sum correctly either.

The page is updated with the latest versions and is made with the DIVI theme.

You can see the error in the page https://haakaa.es/producto/caja-de-prueba-no-esta-a-la-venta/ accessing with the password bopo.

We are waiting for a solution.
Thank you and best regards