It often happens to me that I make changes to the mo HASSIO configuration.
I add a new mqtt smartplug or a new smartphone to device_tracker or sometimes after a Home Assistant upgrade… and inexplicably … Hassio works locally using his IP but no longer works remotely using my mydomain.duckdns.com address.
No errors in the log file, no errors in DuckDNS, no errors in NGINX …
How is it possible?