Domain Access interferes with operation of views with relationships

Prior to installing Domain Access, I had a view set up that included a relationship. The nodes in the view ("events") had a node reference to a "location" node via a field named node_field_data_field_event_site. Most events had locations, but a few did not. This worked fine; events without locations still displayed in the view, because the "required" checkbox was not selected in the view releationship dialog.

After installing Domain Access, the view still worked for event nodes that had locations, but all events that were lacking locations were dropped from the view. The reason for this seems to be the node access check that Domain Access inserts into the view to insure that the node referenced in the view can be displayed in the current domain. Some of the inserted SQL appears below, the key part is the part that says: AND (node_field_data_field_event_site.nid = na.nid). If a location node exists, then there will be some node where this expression is true, and the condition will succeed. If there is no location node, though, then there will be no node where this expression matches, which will cause the entire EXISTS clause to return FALSE, excluding those nodes that do not have locations.

Note: Selecting "Disable SQL rewriting" did happen to work for this view, and I suppose this is semi-viable for this situation, because this particular view contains only objects that are visible to all users, and visible to every affiliate domain. However, I don't see this as a good long-term solution, because I will have other views that require node access, and some of these may have non-required relationships.

I can see why Domain Access is doing this in the general case, but it seems to me that the EXISTS clause is too rigorous for relationships that are not required. Maybe AND ( EXISTS ( ... ) OR (field = NULL) ) would be the right SQL to put in (sorry, not sure about the thing to test for when there is no relationship -- but that's the general idea). Is there an easy way to configure Domain Access &/or my view to generate SQL like this for non-required relationships, or is this a Domain Access bug?

Using Domain Access 7.x-3.9 and mysql 5.5.25 on Drupal 7.22.

$ drush pml --status=enabled | grep -i domain
 Domain Access   Domain Access (domain)                   Module  7.x-3.9       
 Domain Access   Domain Alias (domain_alias)              Module  7.x-3.9       
 Domain Access   Domain Configuration (domain_conf)       Module  7.x-3.9       
 Domain Access   Domain Navigation (domain_nav)           Module  7.x-3.9       
 Domain Access   Domain Settings (domain_settings)        Module  7.x-3.9       
 Domain Access   Domain Source (domain_source)            Module  7.x-3.9       
 Domain Access   Domain Theme (domain_theme)              Module  7.x-3.9
 Domain Access   Domain Views (domain_views)              Module  7.x-1.5

Here's a larger part of the SQL that was added by Domain access.

          AND 
          (
          	EXISTS 
                (
                	SELECT 
                        	na.nid AS nid FROM drupal_node_access na 
                        WHERE 
                        	(
                                	( 
                                        	(na.gid = :db_condition_placeholder_14) 
                                                AND 
                                                (na.realm = :db_condition_placeholder_15) 
                                        )
                                        OR
                                        ( 
                                        	(na.gid = :db_condition_placeholder_16) 
                                                AND 
                                                (na.realm = :db_condition_placeholder_17) 
                                        )
                                        OR
                                        ( 
                                        	(na.gid = :db_condition_placeholder_18) 
                                                AND 
                                                (na.realm = :db_condition_placeholder_19) 
                                        )
                                        OR
                                        ( 
                                        	(na.gid = :db_condition_placeholder_20) 
                                                AND 
                                                (na.realm = :db_condition_placeholder_21) 
                                        )
                                )
                                AND 
                                (na.grant_view >= :db_condition_placeholder_22) 
                                AND 
                                (node_field_data_field_event_site.nid = na.nid) 
                )
          )