Url::fromRoute does not understand Russian characters in the query option

Code:

        \Drupal::service('link_generator')->generate($title, Url::fromRoute('yarcom_sphinx.search_type', array('search_type' => $t), array(
          'set_active_class' => TRUE,
          'query' => array(
            'q' => $i['query'],
          ),
        )));

If $i['query'] is russian characters, css class is-active does not appear.

Example 1:
$i['query'] = 'комацу' (russian characters).
Browser address bar: http://dev.******.ru/search/yarcom_news?q=%D0%BA%D0%BE%D0%BC%D0%B0%D1%86...
Html code:
<a href="/search/yarcom_news?q=%D0%BA%D0%BE%D0%BC%D0%B0%D1%86%D1%83" data-drupal-link-query="{&quot;q&quot;:&quot;\u043a\u043e\u043c\u0430\u0446\u0443&quot;}" data-drupal-link-system-path="search/yarcom_news">News entity</a>

Example 2:
$i['query'] = 'komatsu' (english characters).
Browser address bar: http://dev.*****.ru/search/yarcom_news?q=komatsu
Html code:
<a <strong>class="is-active"</strong> href="/search/yarcom_news?q=komatsu" data-drupal-link-query="{&quot;q&quot;:&quot;komatsu&quot;}" data-drupal-link-system-path="search/yarcom_news">News entity</a>

In the first example q=%D0%BA%D0%BE%D0%BC%D0%B0%D1%86%D1%83" and data-drupal-link-query="{"q":"\u043a\u043e\u043c\u0430\u0446\u0443"}" are not identical.