Mate, been tearing my hair out over this. Think I’ve finally got external access via duck-dns after setting up a brand new domain and reinstalling everything duck dns. I’ve spent about a week getting this thing back up. There are some devices, like the Konnected panel and WEMO switches that don’t seem to want to talk to home assistant at the moment. That and some automations are no longer running for reasons unknown. Been pretty frustrating but life goes on.