I registered a custom post type e.g animal, registered a taxonomy animal_tag who's query_var is tag. Added posts and assigned theme tags.
Now filtering posts in:
/wp-admin/edit.php?post_type=animal&tag[0]=funny&tag[1]=lovely
returns no posts.
But changing the query_var to somethings other than tag, e.g. tags, _tag when registering the taxonomy returns the right number of filtered posts e.g.
/wp-admin/edit.php?post_type=animal&_tag[0]=funny&_tag[1]=lovely
My intuition is that Wordpress is doing some shenanigans with my taxonomy, when queering posts.
So how can I make a custom taxonomy with the search query param 'tag' in URL work?