Views handler LEFT JOIN (node ON node_access) bug

In the views hook domain_views_views_data tables are defined for Views. One table is domain_access. It defines a join between node and domain_access. One extra field is used in the ON:

      array('field' => 'realm', 'value' => 'domain_id', 'numeric' => FALSE),

The result of the left join (from the Views query preview):

LEFT JOIN {domain_access} domain_access ON node.nid = domain_access.nid AND domain_access.realm = 'domain_id'

but there's no reference to the current domain. If I add:

      array('field' => 'gid', 'value' => '***CURRENT_DOMAIN***', 'numeric' => TRUE),

as 2nd extra, the JOIN works:

LEFT JOIN {domain_access} domain_access ON node.nid = domain_access.nid AND (domain_access.realm = 'domain_id' AND domain_access.gid = '1')

Is that how it's meant to work?

I came across this bug when I added "Domain Access: Available on current domain" as field. The result was always "Yes", because there was no domain_id reference in the JOIN, so a result for that nid was always found (because there's always at least 1 domain for every nid).

Related: http://drupal.org/node/1373016