0) open inspector 1) open url http://www.spb.nagasaki-sushi.ru/kitchen/sushi/nigiri/ 2) make a really long order with 20 or more items 3) push the order to server 4) server will fail to process your request due to request header size limit on the server and will return a 400 error code page. You can see this request in Network panel and the request has cookies. But there is no domain entry in Resource Panel/Cookies section.
Closing as invalid, as this bug pertains to the old inspector UI and/or its tests. Please file a new bug (https://www.webkit.org/new-inspector-bug) if the bug/feature/issue is still relevant to WebKit trunk.