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)
For my setup/workflow, individual containers don’t get static IPs, but the machine that they run on gets a static IP. Docker is running on some sort of machine (either bare metal or a VM) which gets a static IP in my router’s settings.