Duckdns Connection not working after update to 2023.08

Hey there,

since the Update to 2023.08 I cant acces my Homeassistant Instance via the Vodafone Network. Only when I use a VPN on my phone. It does not matter if I went to another country Netherlands and Germany. On my PC’s it was working just fine, but not being able to use the phone without VPN is kinda bothering my family.

Any Ideas what Settings I need to check or what the new Version of Hassio could have changed to Hassio/Duckdns?

Start by checking the usual things:

  1. The DuckDNS hostname resolves to your WAN address, shown in the router’s admin pages
  2. The IP address of HA hasn’t changed
  3. The port forwarding is to the IP of HA
  4. You’re using the port you forwarded, if you didn’t forward 443

Sadly checked these things multiple times but still the same behavior.
Port 8123 is forwarded, tried Port 443 open but was and now again is not forwarded.