alextsoi

I am using jetpack version 4.3.1. My fix is in the below, so far so good.

add_filter( 'infinite_scroll_query_args', 'jetpack_infinite_scroll_query_args' );

function jetpack_infinite_scroll_query_args( $args ) {
	
    // Customize the ordering
    $args['orderby'] = 'meta_value_num';
    $args['meta_key'] = 'YOUR_META_KEY';
    $args['order'] = 'DESC';

    try{
    	// Get the start page, if the request is from 1st page, it will be 0,  and then no need to do decrement.
    	$startPage = intval($_POST['query_args']['paged']);
    	if($startPage != 0) $startPage--;

        // Adding $args is to avoid the people making infinite scrolling request in
        // non 1st page
    	$currentPage = ($args['paged'] + $startPage);

    }catch(Exception $x){
        // If error exists, I just use back the paged argument
    	$currentPage = $args['paged'];
    }

    // Using offset is used to override the paged args which will be used in WP_Query
    $args['offset'] = $args['posts_per_page'] * $currentPage;
    
    return $args;
}

If you will use infinite scroll for custom post type with meta_key ordering, you have to change the query params in ‘pre_get_posts’ hook too to make the post display consistent.