JIRA 7.2.0 - 7.13.0 missed Admin/System/Issue Feature Section

Could you help me to understand why in atlassian-plugin.xml for following WEB-ITEM

  <web-item key="work-item-parent-config-link" section="admin_system_menu/top_system_section/issue_features" name="Work Item Parent Configuration Link" weight="200">
    <label key="com.sourcesense.anritsu.jira.plugin.workItemParentConfigurationLink"/>
    <link linkId="workItemParentConfigLink">/secure/admin/WorkItemParentConfig!default.jspa</link>
  </web-item>

this path (admin_system_menu/top_system_section/issue_features) is existing in jira-project/jira-components/jira-core/src/main/resources/webfragment/system-admin-sections.xml, but I steel can’t see my web-item in this section. Moreover admin “Issue Features” section is not visible at all! It worked fine on JIRA 6.4.14 but not working from JIRA 7.X.X. I was logged as ADMIN on this JIRA server.

Does anyone know a root cause?