Same issue for me. not using plex - but I am mounting shares with both nfs and cifs
Aug 09 09:30:24 gwen kernel: NETDEV WATCHDOG: enp4s0 (r8169): transmit queue 0 timed out Aug 12 15:48:57 gwen kernel: NETDEV WATCHDOG: enp4s0 (r8169): transmit queue 0 timed out
The only way to get the network back is a full reboot.
Same issue for me. not using plex - but I am mounting shares with both nfs and cifs
Aug 09 09:30:24 gwen kernel: NETDEV WATCHDOG: enp4s0 (r8169): transmit queue 0 timed out
Aug 12 15:48:57 gwen kernel: NETDEV WATCHDOG: enp4s0 (r8169): transmit queue 0 timed out
The only way to get the network back is a full reboot.