WP_Query – Multiple Taxonomies warning

Hi guys! ??

I have problems with WP_Query for multiple taxonomies, array:

[tax_query] => Array
        (
            [relation] => AND
            [0] => Array
                (
                    [taxonomy] => catalogue
                    [field] => slug
                    [include_children] => 1
                    [terms] => Array
                        (
                            [0] => wina
                        )

                )

            [1] => Array
                (
                    [taxonomy] => aoc
                    [field] => slug
                    [terms] => Array
                        (
                            [0] => aoc-xxx
                            [1] => aoc-yyy
                        )

                    [operator] => IN
                )

            [2] => Array
                (
                    [taxonomy] => manufacturer
                    [field] => slug
                    [terms] => Array
                        (
                            [0] => ostrowin
                            [1] => wojnar
                        )

                    [operator] => IN
                )

        )

Situation: I have multiple choice for AOC and Manufacturers. Everything seems fine, until parsing aoc terms. WP_Query has problems with this one.

Warning: preg_split() expects parameter 2 to be string, array given in /_hosting/_gd/_winamp/wp-includes/query.php on line 1726

Warning: preg_split() expects parameter 2 to be string, array given in /_hosting/_gd/_winamp/wp-includes/query.php on line 1726

Lines in WP_Query:

$tax_query[] = array_merge( $tax_query_defaults, array(
	'terms' => preg_split( '/[,]+/', $term )
) );

I really don’t know what is going on, manfuacturers are exacly the same taxonomy, and works fine. I must write code in strict mode. I cannot modify core, but it look like this solution works perfectly:

$tax_query[] = array_merge( $tax_query_defaults, array(
  'terms' => $term //preg_split( '/[,]+/', $term )
) );