CoreDNS iamworkin.lan template + ndots:5 was hijacking unrealircd.irc.svc.cluster.local lookups → Traefik VIP → timeout. Every alert since ~2026-04-09 silently failed with "IRC send failed: timed out", which also killed the thermal-printer path (routed through irc-notify). Same fix pattern as guacamole@28b7600.