[Bug]: Session Expires in AdminJS with Node.js Clustering Using express-session

[AsServices]

Contact Details

No response

What happened?

When using AdminJS in a Node.js application with the cluster module, logging into the AdminJS panel (/admin) is successful, but after login, its showing alert message "session expired" error and a redirection to /admin/login. This issue occurs only in a clustered environment and not when running a single process.

To Reproduce
Set up a Node.js application with clustering, using @adminjs/express, express-session.
Configure AdminJS with buildAuthenticatedRouter and a MongoDB database adapter.
Start the server with multiple workers (e.g., node run.js).
Access http://localhost:9090/admin, log in with valid credentials.
Observe the "session expired" error and redirection to /admin/login.

Expected Behavior
The session should persist across requests in all cluster workers, allowing uninterrupted access to AdminJS resources after login.

Actual Behavior
After a successful login, navigating to resources or refreshing the page triggers a "session expired" error and a 302 redirect to /admin/login.

Environment
Node.js version: v24
AdminJS version: adminjs@7.8.16
Database adapter: Mongodb/mongoose
Environment: Production (NODE_ENV=production)

Bug prevalence

every time with cluster

AdminJS dependencies version

 "@adminjs/bundler": "^3.0.0",
  "@adminjs/express": "^6.1.1",
  "@adminjs/mongoose": "^4.1.0",
  "@sendgrid/mail": "^8.1.5",
  "adminjs": "^7.8.16",

What browsers do you see the problem on?

No response

Relevant log output

Relevant code that's giving you issues

[dziraf]

You use express-session but do you use a session store? Otherwise the session is saved in the memory and it's expected behaviour