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)
I rather worded it poorly
Nah. Your question was fine. The person who responded to you was just wrong. Hopefully you’ve seen the other replies to their comment.