@Gargron Got it, that makes sense. Most of the "running mastodon" guides I read said to run "pull" as well (probably to get the Redis and Postgres images, but I think those would be pulled on-demand when calling "up" anyways).
I think I hit an issue where it pulled and used the :latest image and that didn't match up with the assets from the v1.3.2 source I was on. I'll just clear images, build from source, and hope that works :)