Something is interfering with port 53 traffic on your network:
*** [ DIAGNOSING ]: Name resolution (IPv4) using a random blocked domain and a known ad-serving domain
[✓] gjapplog.ucweb.com is 0.0.0.0 on lo (127.0.0.1)
[✗] Failed to resolve gjapplog.ucweb.com on enp1s0f0 (192.168.1.235)
[✓] gjapplog.ucweb.com is 0.0.0.0 on tun0 (10.8.0.1)
[✗] Failed to resolve gjapplog.ucweb.com on docker0 (172.17.0.1)
[✓] doubleclick.com is 142.250.72.142 via a remote, public DNS server (8.8.8.8)
*** [ DIAGNOSING ]: Setup variables
PIHOLE_INTERFACE=enp1s0f0
IPV4_ADDRESS=192.168.1.235/24
Additionally, your DHCP server is passing out a DNS other than Pi-hole, along with the Pi-hole IP. This will lead to some of your DNS traffic bypassing Pi-hole.
DHCP options:
Message type: DHCPOFFER (2)
server-identifier: 192.168.1.1
lease-time: 43200 ( 12h )
renewal-time: 21600 ( 6h )
rebinding-time: 37800 ( 10h 30m )
netmask: 255.255.255.0
broadcast: 192.168.1.255
domain-name: "lan"
dns-server: 192.168.1.235
dns-server: 1.1.1.1
router: 192.168.1.1
--- end of options ---