I'd also recommend you to setup a simple test instance that's not in you openstack
- A fresh and updated machine/VM running Debian 12
- your machine should have a public ip / port forwarding
- ports 80 and 443 open for incoming connections (make sure routers etc allow it)
- a FQDN pointing to your public IP
lets see if you get this weird issue, if not it means something is configured wrong in you prod infrastructure
Let us know how it went 🙂