Secrets seem to periodically be removed

We have a python app that uses environment variables for the usual stuff, like DB connection data. We set up the secrets for these on fly.io using the CLI and they seem to work. But every once in awhile, some of the secrets seem to stop working and we have to reset them from the CLI.

We have not pinned down a cause for this yet as it sort of seems random at this point. Has anyone run into this issue? This breaks our application backend completely when this happens.