SQL::addWhere not defaulting to "IN" operator when using EntityReferenceView for multiple values

I added a entity reference field to a content type to hold unlimited values. For the "Reference method" I am using a entity reference view. I am using the widget autocomplete.

When I add more then one value I get the following exception:

Drupal\Core\Database\DatabaseExceptionWrapper: Exception in Reservable Resources[reservable_resources]: SQLSTATE[HY000]: General error: 1 near ":db_condition_placeholder_5": syntax error: SELECT node_field_data.created AS node_field_data_created, node_field_data.nid AS nid FROM {node_field_data} node_field_data LEFT JOIN {node__field_reservable_by} node__field_reservable_by ON node_field_data.nid = node__field_reservable_by.entity_id AND (node__field_reservable_by.deleted = :views_join_condition_0 AND node__field_reservable_by.langcode = node_field_data.langcode) WHERE (( (node__field_reservable_by.field_reservable_by_target_id IN (:db_condition_placeholder_2, :db_condition_placeholder_3)) AND (nid = :db_condition_placeholder_4:db_condition_placeholder_5) )AND(( (node_field_data.status = :db_condition_placeholder_6) AND (node_field_data.type IN (:db_condition_placeholder_7)) ))) ORDER BY node_field_data_created DESC; Array ( [:db_condition_placeholder_2] => authenticated [:db_condition_placeholder_3] => administrator [:db_condition_placeholder_4] => 7 [:db_condition_placeholder_5] => 10 [:db_condition_placeholder_6] => 1 [:db_condition_placeholder_7] => merci_resource [:views_join_condition_0] => 0 ) in Drupal\views\Plugin\views\query\Sql->execute() (line 1457 of core/modules/views/src/Plugin/views/query/Sql.php).

I tracked this down to the following line in: core/modules/views/src/Plugin/views/display/EntityReference.php

// Add an IN condition for validation.
    if (!empty($options['ids'])) {
      $this->view->query->addWhere(0, $id_field, $options['ids']);
    }

I updated to add the "IN" operator to prevent the exception.

The docs say the "IN" operator is the default. But that's not happening on my system.

I am using SQLite 3.8.7.2 on OSX. Apache/2.2.29 (Unix) mod_wsgi/3.4 Python/2.7.8 PHP/5.6.7 mod_ssl/2.2.29 OpenSSL/0.9.8zg DAV/2 mod_fastcgi/2.4.6 mod_perl/2.0.8 Perl/v5.20.0