Hi,

I have a service called eigeniv-backend in my project, staging environment.

The default Railway URL works perfectly:

https://eigeniv-backend-staging.up.railway.app/health returns a healthy response every time.

But my custom domain does not work:

https://api-staging.eigeniv.com/health returns a 502 error, "Application failed to respond," every single time.

Both are supposed to point to the exact same service.

I have already checked:

• DNS is correctly set up (CNAME pointing to eigeniv-backend-staging.up.railway.app)
• DNS has fully propagated worldwide, confirmed with a DNS checker tool
• The domain ownership verification record is also fully propagated
• The port is set correctly (3000) in the custom domain settings
• I have removed and re-added the custom domain twice, waiting several minutes each time, with no change

Since the same service works fine on Railway's own URL but not on my custom domain, I believe there may be a routing issue on Railway's side connecting this domain to my service.

This project was deleted and recreated once during initial setup, so there may be a leftover/stale configuration from that.

Could you please check why api-staging.eigeniv.com isn't routing to my service correctly?

Thank you.