Recently we have upgraded our servers from 6.2 to AEM 6.4.4 and we observed for some users one group is getting dropped frequently in author
because of this user is unable to edit the page. Once this group is added then the user is able to edit the page. Can any one help me in this issue why particularly only this group is getting dropped for some users.
Do you have a custom authentication handler or SAML configured?. If latter then ensure the group assignment and creation of group is working as expected by looking at the OSGI config. If former then make sure that your custom code is appropriately assigning proper group after it receives the SAML assertion.