pagination custom post type on CP page
I know that there are a lot of topics on this question and I've read a lot of them and tried different things. But pagination is still not working. I think it has something to do with the permalink settings.
The situation
I have a custom post type called artists which I link to events. On the artist page I show all the events the artist is linked to (they're linked using the posts 2 posts plugin). I'd like to paginate these events. Let's use ACDC as an example artist.
The pagination is showing, and the links point to root/artist/acdc/page/# where # is the page number.
If I click on page 2 for example I'm not going to root/artists/acdc/page/2. The page does seem to load, but I end up at the same URL showing the first 3 posts (roots/artists/acdc). So I don't get a 404.
When I go to root/artists/acdc?page=2, the URL becomes root/artists/acdc/2/, but it still displays the 3 posts from page 1. This happens when 'format' is set to '/page/%#%' in paginate_links. If I then hover the pagination link for page 3, the link becomes root/artists/acdc/2/page/3...
My settings
- Permalink custom structure: 
/%category%/%postname%/ - I'm using the roots theme which does apply some rewrites, but I as far as I can see there are not rewrites for the permalinks / page structure
 
Stuf I've already tried
- Changed 'show maximum of' setting in WP settings from 10 to 1
 - Changed 
'paged'to'page'in$paged - Going to the URL 
root/artists/acdc/page/2, no luck as described above - Going to the URL 
root/artists/acdc?page=2, no luck and weird behavior as described above - Changed 
'format'inpaginate_linksto'?page=%#%' 
My code (which is on the artist custom post type template but will eventually be stored in functions.php
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
$args = array(
    'connected_type' = 'artists_to_events',
    'connected_items' = get_queried_object(),
    'post_type' = 'events',
    'post_status' = 'publish',
    'posts_per_page' = 3,
    'paged' = $paged,
    'meta_key' = 'custom_date',
    'orderby'= 'meta_value',
    'order' = 'ASC'
);
$query = new WP_Query($args);
$big = 99999999;
echo paginate_links(array(
    'base' = str_replace($big, '%#%', get_pagenum_link($big)),
    'format' = '/page/%#%',
    'total' = $query-max_num_pages,
    'current' = max(1, get_query_var('paged')),
    'show_all' = false,
    'end_size' = 2,
    'mid_size' = 3,
    'prev_next' = true,
    'prev_text' = 'Vorige',
    'next_text' = 'Volgende',
    'type' = 'list'
));
Because of the weird URL behaviour I don't really know where the problem lies. Any ideas?
Topic paginate-comments-links pagination Wordpress
Category Web