Is it safe to assume that this is related to your earlier post related to Plex Media Server shutting down?
If so, it would likely be better to continue in that thread and update it with your findings. It would also be helpful if you included the full PMS versions involved (Settings → [Select Server Name from Drop-down] → General).
Finally, your server logs will mostly likely be needed for any troubleshooting/diagnosis to be done (click the orange link for steps of how to collect the logging). As long as they haven’t rolled too recently they should show information from when you were on the problematic version.
