all the containers change IP addresses frequently. For home assistant a static IP address of the proxy manager is mandatory in order to reach it. For jellyfin it is useful to see which device accesses jellyfin. If the IP always changes, it doesn’t work properly.
How do I fix a container IP with podman compose (or docker)
Inside the virtual docker network they do have temporary IPs and hostnames. But it is pointless to reference these IPs, just use the hostnames which should be identical to the container name.