Thank you gentlemen, false alarm apparently.
Netstat and lsof didn’t show anything.
Looks like the underlying hard disk for the node was having a problem.
Powering down, jiggling the power cable, and rebooting the server fixed it.
Here was the docker port setup for that node btw, nothing fancy.
ports:
- "28971:28967/udp"
- "28971:28967/tcp"
- "14007:14002"