FTP user accounts passwords keeps resetting

[BadJimmyZ]

The passwords for the two initial user accounts resets once or twice per month, but intermittently (not in predictable intervals). I then have to manually reset the passwords to known values for the users to resume using it. When this happens, it's always both the FTP accounts at the same time (the exact same instant).

My initial suspicion was the container resets to default values at stop/start, however start count remains 0 for the container.

This was deployed as Azure Container Instances thus Docker CLI commands don't work, which reduces the amount of troubleshooting I can do.

I checked all the usual things on the Linux OS itself and confirmed the passwords are actually resetting (in /etc/shadow) and passwords are not set to expire or anything. I've also combed through the container logs for hours and there is nothing regarding passwords being reset.

We have a second deployment, a few months older, of Atmoz/SFTP via ACI and surprisingly this one does not experience this issue. I've compared the config the two deployments and it's identical. So I'm stumped as to why the passwords for both accounts reset simultaneously.

Anyone seen anything like it?