The poll loop remembered what it read rather than what it published, so a value the node could not publish counted as said: the next poll skipped it, succeeded, and health went back to ok with the port still dark. Remember it only after inject returns, and report ok last. A node reporting itself down is now derived into its flow's issues on read and counted on the health summary, so the canvas marks it and Home says so. Being down does not stop the flow, and the issue clears by itself when the node reports well again. The repeating poll warning is logged once per outage rather than once per tick. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01K1moruzue2kTJd3uVisgNk