If so, I would start by exporting the configuration from the database:
mix pleroma.config migrate_from_db --env=prod -d --path=/opt/pleroma/config/export_prod.secret.exs
then going in to the original prod.secret.exs and setting config :pleroma, configurable_from_database: false, then restart the pleroma service.
Log back in and try to recreate the issue. If it happens, then it’s not an issue with your backend configuration. If it doesn’t then it is an issue with your backend configuration.