If you could provide debug logs from the server for your current tuning problems, will have a look and see what the issue is. Please indicate what was being tuned and the time.
Thank you
See the following support articles for ensuring debug logging is enabled on the server and for downloading the logs zip.
https://support.plex.tv/articles/201643703-reporting-issues-with-plex-media-server/
https://support.plex.tv/articles/200250417-plex-media-server-log-files/
