WP_User_Query() search Bug

for example I run

$query = new WP_User_Query( array( ‘search’ => ‘sand’ ) );

and get no results returned unless I set ‘sand’ to the exact match, like ‘sandbox’ (in my case).

var_dump below. Specifically looking at the ‘query_where’, where it should be user_login LIKE ‘%sand%’ with the ampersands to actually query LIKE terms.

object(WP_User_Query)#5 (8) {
  ["results"]=>
  array(0) {
  }
  ["total_users"]=>
  string(1) "0"
  ["query_fields"]=>
  string(30) "SQL_CALC_FOUND_ROWS wp_users.*"
  ["query_from"]=>
  string(13) "FROM wp_users"
  ["query_where"]=>
  string(67) "WHERE 1=1 AND (user_login LIKE 'sand' OR user_nicename LIKE 'sand')"
  ["query_orderby"]=>
  string(23) "ORDER BY user_login ASC"
  ["query_limit"]=>
  NULL
  ["query_vars"]=>
  array(15) {
    ["blog_id"]=>
    int(1)
    ["role"]=>
    string(0) ""
    ["meta_key"]=>
    string(0) ""
    ["meta_value"]=>
    string(0) ""
    ["meta_compare"]=>
    string(0) ""
    ["include"]=>
    array(0) {
    }
    ["exclude"]=>
    array(0) {
    }
    ["search"]=>
    string(4) "sand"
    ["orderby"]=>
    string(5) "login"
    ["order"]=>
    string(3) "ASC"
    ["offset"]=>
    string(0) ""
    ["number"]=>
    string(0) ""
    ["count_total"]=>
    bool(true)
    ["fields"]=>
    string(3) "all"
    ["who"]=>
    string(0) ""
  }
}