dynamic price bundle cross-sell with variable product

I created a bundle for cross-sell popups with dynamic prices discounted as a percentage.
The add form calculates the correct prices, but when I add it to the cart it adds it with a different price.
Can you help me?
You can see the example on this product
https://insedia.it/prodotti/rio-tavolo-nardi-allungabile-da-interno-in-alluminio-e-polipropilene/