Hi everyone, not sure if this helps but always like to share info when I can.
Similar issue as described here - Plex working fine then all of a sudden (with no known changes made to either unraid server or home networking setup) it became unreachable from either the dcoker UI or from three other clients throughout the house all connected via ethernet. Unraid server was working fine, able to connect to internet etc.
I was about to start rebooting everything (although i was super reluctant to reboot the unraid server as I'm at 82 days of uptime and super happy with how stable it has been) when I noticed there was an update available for the plex docker. I applied it, re-started the docker and then (so far - half an hour later) have had no problems.
If anyone wants me to check anything in log files etc just let me know - happy to provide more info. Really can't correlate the two activities but there it is...
Mike