Although I've read many other answers with the same question on StackOverflow none of them where able to fix the issue I have.

I'm using ACF and have a custom post type called "services". The CPT has a custom taxonomy called "category", this returns the TermID of the taxonomy.

This was working before when I used a standard taxonomy, but since i've switched to the ACF taxonomy it has stopped working.

//This works fine
$serviceName = $wp_query->query_vars['test'];

//CURRENT The loop issue with ACF which doesnt work
   $args = array(
        'post_type' => 'services',
        'tax_query' => array(
            array(
            'taxonomy' => 'category',
            'field' => 'slug',
            'terms' => $serviceName
             )
          )
    );


//OLD The loop when using standard taxonomy that works
   $args = array(
        'post_type' => 'services',
        'category_name' => $serviceName,
    );


//Display
$service_posts = get_posts( $args );

In Functions.php I have created a function which makes the ACF categories filter out the ones I don't want. This is to prevent the user choosing categories which aren't services.

function service_categories( $args, $field, $post_id ) {

    $args['orderby'] = 'count';
    $args['order'] = 'DESC';
    $args['include'] = '6, 7, 8, 9, 10, 15, 16';
    return $args;

}

This works on the dashboard, however I wonder if this at all may be interfering at all?

Thank you for your time.

EDIT:

Also noticed when you view all the CPT's the category tab is blank, not sure why this is since as far as I'm aware the ACF should overwrite this anyway.