Just a quick one.
pfSense with a manual collectd-package installation, with a configuration named “FQDNLookup False” which still reports FQDN to collectd-masterserver.
Seems FreeBSD does stuff differently, so instead use “Hostname <hostname>” in the collectd.conf to enter the shortname.
I just had an issue where Plex on my android-phone constantly nagged about synced items, claiming that the server needed updates before it could sync.
My phone also constantly tried to resync, then discarded the download, resynced, discarded, etc.
Data usage showed about 1tb of transferred data before I noticed.
Resolution was to wipe data from client, and re-authorize it.