Oh, and just another odd tidbit of info.  I compared when Bitnodes said it "stalled" to the log entries above.  According to the log it stopped at midnight, but according to Bitnodes it was still working and responding to queries up to 3am.  5 hours later it shows when it came back after I restarted it just after 8am.

Seems it worked from memory for those three hours after the logged error.