Workspaces are seemingly not persisting data whatsoever.

Hi all. To keep things brief: when I create a workspace off of the "Docker Containers" starter template and save any files to my home directory (/home/coder), the files are totally lost after the workspace restarts. It is my understanding from reading docs that this is not supposed to be happening, and it's certainly not how I remember Coder behaving in the past. This is happening on a totally fresh Coder install (same behavior on coder server and a Docker run or docker-compose install). I'm not sure if it's related, but I see that the home_volume resource that's automatically created with the template is saying that "No agents are currently assigned to this resource", and that's just about the only clue I've otherwise got. Would be extremely grateful for any guidance.