Custom SSO authentication handler is not getting triggered after upgrading from AEM 6.2 to 6.4 .Can anyone share the process/examples for creating custom sso auth handler for AEM 6.4 version.

Hi All,Recently we have migrated our project from 6.2 to 6.4 ,after that all pages browser tab title are not getting displayed as expected.The browser tab title is displaying as "AEM Editor" in edit/preview mode instead of displaying Page title. Please advise.