Shutdown wasn't handeld properly by redis via docker-compose
I rescaled my instance which forced me to shut it down. I tried without docker-compose down and that mostly worked. I noticed something was off though as some data were saved (e.g. my username and profile picture) but not others (e.g. the room information). While checking docker-compose ps I notice the redis server didn't start correctly. I then did a docker-compose down then up again and it worked.
It's a corner case but prefer to share what happened in case someone else encounters a similar issue.