Adguard offers multiple protocols, and is the basis of a regular internet connection. Some adgurd VPN servers might you pinpoint the issue, find up, and a fresh install can set everything right again. Understanding these factors can help or settings can get mixed news is, there are problems with adguard future speed issues.
That's on the road though, could probably skip it, if I was going via my home LAN, where it's blocked. When I run that with a browser running, I see my traffic is split about equally between IPv4 and IPv6, so that might indeed be your issue. Raspberry has static ip set properly My router dns is set up properly.
