Node Runners, ever have bitcoind stop syncing and stick at 1 connection?

Suddenly bitcoind only reports 1 connection in, 0 out. Did some ‘addnode=‘ to help it along, but still won’t go above 1 connection. It’s stuck 100+ blocks back, too. Won’t sync. It had been running flawlessly for months until just yesterday. I've tried rebooting the whole node a couple different times, too. It's tor-only and I still have plenty of disk space. Thoughts on what else to look at?