I experience weird connectivity errors on my home wifi after updating my router. I run a pixel 6a with GrapheneOS 20240904. The connectivity issues occured already on monday, so before 20240904.
The Phone has wifi and internet connection, many sites (e.g. grapheneos.org, google.com) and apps (e.g. youtube, strava) work fine.
Other apps like reddit or komoot claim they don't have an internet connection. If I use Vanadium to access reddit or duckduckgo I get the error ERR_ADDRESS_UNREACHABLE.
This only happens for my grapheneos pixel 6a phone, my (Debian) laptop and my Android 10 phone can access the sites just fine.
On 5G connection the sites and apps work just fine. So it must be a combination of router+grapheneos but I can't imagine what it might be. Any ideas? Any hints on how to start debugging the issue?