OK, I upgraded tonight to the latest verion, 77.3, and connection is fine, no problems upgrading at all. I had been running 76.2, which probably would have caused me problems if running NR through hassio.
There must be a connection difference. I connect through http, and with hassio I have no idea how it is connecting.
BTW, for “kicks”, I stopped NR on the pi, and reinstalled hassio NR and tried that. Started it, but it complained about passwords and certs. It did come up, and the HA nodes said connected, but they didn’t act like they were connected, no response. And everything is much slower running like this. I tried to delete and make a HA node again, but it crashed my pi when I deployed this. I restarted the PI, HA and NR, but couldn’t get NR to talk to HA even though I didn’t get any connection error messages.
After about an hour of “fun”, I gave up. Restarted HA and uninstalled NR from HA, then restarted NR in the other pi. Everything works again, back to normal.
With that, I will stop talking about using another pi for NR, the horse is dead.