Load more not working with custom field ordering

Hello.

I’m trying to order some posts using a custom field input. I manage to get it to work using this custom code:

function my_pre_get_posts( $query ) {
    
    // do not modify queries in the admin
    if( is_admin() ) {
        
        return $query;
        
    }
    
    // only modify queries for 'formacoes' post type
    if( is_front_page() && isset($query->query_vars['post_type']) && $query->query_vars['post_type'] == 'formacoes' )  {
        
        
        $query->set('orderby', 'meta_value');   
        $query->set('meta_key', 'data_inicio');
        $query->set('order', 'ASC');
        $query->set('meta_value', date('Ymd'));
        $query->set('meta_compare', '>=');
        
        
    }
    

    // return
    return $query;

}
add_action('pre_get_posts', 'my_pre_get_posts');

It works for the posts that are showing up, but if I click the load more button it doesn’t assume the custom order.

Can you help find the reason why?

Thanks.

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