Warning: RWMB_Post_Field::search_by_title() expected to be a reference

After updating to Meta-Box version version 5.5.0, I am getting the following warning on a post field displayed using a select-advanced field-type with values populated with a query_args filter -- (is this why no one talks to me at cocktail parties?)

Warning: Parameter 2 to RWMB_Post_Field::search_by_title() expected to be a reference, value given in .../wp-includes/class-wp-hook.php on line 303

The field array used to generate the meta-box is as follows:

array (
    'id' => $prefix . 'venue',
    'type' => 'post',
    'name' => 'Venues',
    'class' => 'venue_live',
    'std' => '',
    'required' => 1,
    'post_type' => 'venue',
    'field_type' => 'select_advanced',
    'query_args' => array(
        'author' => SELF::get_current_user_id(),
    ),
    'multiple' => true,
    'placeholder' => 'Select Venue(s)'
),

The problem persists when the filed array is reduced to:

array (
    'id' => $prefix . 'venue',
    'type' => 'post',
    'post_type' => 'page',
    'name' => 'Venues',
),

I will now dig into the WP search_by_title function and back trace the issue, but though I would post here to see if this is a known issue.