Getting string in $args instead array in PLL_Filters->get_pages()

I have a custom post_type and a custom taxonomy. When i do get_posts() with this parameters:

array(
	'order' => 'ASC', 
	'orderby' => 'meta_value', 
	'meta_key' => 'order',
	'post_type' => 'descriptions',
	'category_name' => '',
	'tax_query' => array(
		array(
			'taxonomy' => 'pages',
			'field' => 'slug',
			'terms' => 'desc_page_wine_ru'
		)
	),
	'meta_query' => array(
		'relation' => 'AND',
		array(
			'key' => 'city',
			'value' => 'mow',
			'compare' => 'LIKE'
		)
	)
)

– then i get a warning: Illegal string offset ‘post_type’

Here is stack trace:

wp-content/plugins/polylang/include/filters.php:138
PLL_Filters->get_pages()
wp-includes/class-wp-hook.php:287
apply_filters('get_pages')
wp-includes/taxonomy.php:874
get_term()
wp-includes/class-wp-term-query.php:1019
WP_Term_Query->populate_terms()
wp-includes/class-wp-term-query.php:838
WP_Term_Query->get_terms()
wp-includes/class-wp-term-query.php:288
WP_Term_Query->query()
wp-includes/class-wp-tax-query.php:637
WP_Tax_Query->transform_query()
wp-includes/class-wp-tax-query.php:562
WP_Tax_Query->clean_query()
wp-includes/class-wp-tax-query.php:394
WP_Tax_Query->get_sql_for_clause()
wp-includes/class-wp-tax-query.php:324
WP_Tax_Query->get_sql_for_query()
wp-includes/class-wp-tax-query.php:274
WP_Tax_Query->get_sql_clauses()
wp-includes/class-wp-tax-query.php:250
WP_Tax_Query->get_sql()
wp-includes/class-wp-query.php:2122
WP_Query->get_posts()
wp-includes/class-wp-query.php:3432
WP_Query->query()
wp-includes/post.php:2050
get_posts()
wp-content/themes/citypubcrawl/include/html.php:26
show_category_html()
wp-content/themes/citypubcrawl/blocks/_description.php:47

I found that PLL_Filters->get_pages() always get string “pages” in $args parameter instead array