I have separated my local network into multiple VLANs and run AdGuard Home. I added two Wireguard VPN interfaces that work well, too. I also use policy-based routing to ensure that one IP uses a separate Wireguard interface. This works well. I still have DNS leaks from AdGuard, which means that despite using VPN, the AGH DNS servers are still shown. This is fine for all devices except one.
How can I make sure that this respective IP does not have the DNS leaks with the Wireguard connection. I am not sure whether it is possible, but I would not need AdGuard Home for that IP.