SharePoint 2019 Site Prompts for Credentials After 30 Minutes of Inactivity

Hello everyone,

I have a SharePoint 2019 site that exhibits a peculiar behavior. When the site remains idle for approximately 30 minutes and is accessed publicly, it prompts for credentials. However, this issue is not encountered when accessing the site internally, directly from the server. Interestingly, there is no issue when using the Mozilla Firefox web browser.

I would appreciate any insights or suggestions on how to resolve this issue. It seems to be related to authentication or session management, but I'm not sure where to begin troubleshooting. Has anyone encountered a similar situation with SharePoint 2019? Any guidance on resolving this issue would be greatly appreciated.

Thank you for your assistance