We have integrated OnPrem ADFS for authentication with OnPrem Sitecore setup. ADFS is used to authenticate both sitecore CM and CD. We have allowed some of the pages for anonymous user(from Security Access Viewer) so those could be accessed with out login from CD. Recently On one of the environments we are facing an issue on sitecore CD where user is redirecting to login page when accessing the anonymous pages. We could not find the root cause and there are no recent changes that could cause this issue.
Anyone faced a similar issue or could provide any help to find the root cause would be great help.
Sitecore version 9.3