getStaticProps returning undefined except I refresh my page

Question

I'm having a problem in my nextjs app (13.0.5)

When navigating through the website, product, seller and sellerProducts are undefined except I refresh the page...

Ive tried fetching iit in the client with a useeffect, but I need this to work.

I have the same logic in other projects and they work fine...

I don't understand what is going on... Any help? Thanks!

dir: /product/[slug].tsx

const ProductPage = ({
  product,
  seller,
}: {
  product: Product;
  seller: Seller;
}) => {
  const { user, updateUser } = useUser();

  console.log(seller, product);

  if (!product || !seller) {
    return (
      <PageLayout>
          <p className="animate-pulse">Cargando...</p>
      </PageLayout>
    );
  }
  return (
    <PageLayout>
      <div className="contain flex flex-col">
        <ProductBody
          product={product}
          seller={seller}
          isActive={user.id === seller.id}
        />
      </div>
    </PageLayout>
  );
};

export const getStaticPaths: GetStaticPaths = async () => {
  //logic here
  return { paths: allPaths, fallback: false };
};

export const getStaticProps: GetStaticProps = async ({ params }) => {
  const productId = params?.slug;
  if (!productId) {
    return { props: { product: null, user: null } };
  }

  const { data: product, error } = await supabase
    .from("products")
    .select("seller, id, published_version, created_at, published")
    .eq("id", productId)
    .eq("published", true)
    .single();

  console.log("RESULTADOS", product, error);
  if (error || !product) {
    return { props: { product: null } };
  }

  if (!product || !product.seller) {
    return { notFound: true }; // Return notFound: true when the product doesn't exist
  }

  const { data: seller, error: sellerError } = await supabase
    .from("users")
    .select("*")
    .eq("id", product.seller)
    .single();

  if (sellerError || !seller) {
    return { notFound: true };
  }

  return {
    props: {
      product,
      seller,
    },
    revalidate: 1,
  };
};

export default ProductPage;