Can't access websites when using AdGuard Home as my DNS

[alexanderfreundlieb]

Hi everyone

As the title says, I can't seem to reach any websites as soon as I set AdGuard Home to be my DNS server. When trying to access e.g. google.com, I get a Server Not Found error. However, running nslookup google.com returns the following response:

nslookup google.com
Server:  43a1e4c4800b
Address:  192.168.1.230

Nicht autorisierende Antwort:
Name:    google.com
Addresses:  2a00:1450:400a:802::200e
          142.250.203.110

Also, the query log in AdGuard Home shows, that the domain was successfully processed with no error.
Accessing domains, which I've added to the DNS rewrites section in my AdGuard Home installation works.

Some notes about my setup:
I'm running AdGuard Home as a rootless Podman container on a Raspberry Pi 5 running AlmaLinux. Here's the Quadlet configuration for my container:

[Unit]
Description=AdGuard Home

[Container]
ContainerName=adguard
Image=docker.io/adguard/adguardhome:v0.107.57
AutoUpdate=registry

# Volume mapping
Volume=%h/containers/storage/adguard/work:/opt/adguardhome/work:Z
Volume=%h/containers/storage/adguard/conf:/opt/adguardhome/conf:Z

# DNS
PublishPort=8053:53/tcp
PublishPort=8053:53/udp
# Web UI
PublishPort=3000:3000/tcp

[Service]
Restart=unless-stopped
TimeoutStartSec=900

[Install]
WantedBy=default.target

Note that I'm redirecting port 53 to 8053.

I'm also running Nginx Proxy Manager on the same host.

Here are my Adguard Home Settings:
Upstream DNS:

1.1.1.1
https://dns10.quad9.net/dns-query
https://dns.adguard-dns.com/dns-query
https://dns.cloudflare.com/dns-query

Enable encryption: false

I appreciate any help or hints.