Site freezes after few minutes of inactiveness

[nirb4321]

Hey,
we are a ReactJS application with OICD (same as your example with your Nginx image), and we experience the following issue:

A user who hasn't been active for few hours and attempts to keep working gets errors until the site is hard refreshed.

By watching the Network tab in the developer tools we get CORS error with the our Authorization Server for some reason.
Moreover, this behavior started after we moved to OIDC authentication (we used Kerberos before).

In addition, in our environment each user is a member of many security groups, that fact causes the ID token and the Access token to be very large, therefore our session cookie is extremely large.
Are there any solutions to this problem?
Thank you!

[nirb4321]

added a photo of the issue