Neve theme doesn’t make scroll the background images on mobile

Hi, I’m using neve template, and add differents background images in differents pages, and add @media to change the image to show in movil version, it works great, but can not make them scroll in the page.

In the pages that have more text, the image is resize to the total height and only see the center. It does not scroll with the page, or keep it still in the background.

Can I make a scroll image for movil? Excuse me if I can not say it clear enough.

In this in the PC version works fine, but in movil doesn,t work. There′s something that I’m missing but I can’t find what is.

I appreciate your help

/* PRUEBA1 */

body.page-id-2905 {

background-image:url("https://www.sebastianvinet.dance/wp-content/uploads/2023/11/inicio-1920.jpg");
background-position: center center; 
background-size: cover; 
background-repeat: no-repeat; 
background-attachment: fixed, scroll;
}
	
@media (min-width: 700px) {
  .container {
    width: auto !important;
  }
}
/* imagen a mostrar más peque?a */
@media screen and (max-width: 400px) {
body.page-id-2905
 {	   
background-image: url("https://www.sebastianvinet.dance/wp-content/uploads/2023/11/inicio-1920.jpg"); 
	display:none;
background-image: url("https://www.sebastianvinet.dance/wp-content/uploads/2023/11/inicio-720.jpg"); 
background-attachment: fixed, scroll;
	display: absolute;	
	 background-position: center center; 
background-size: cover; 
background-repeat: no-repeat; 

    }
}

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