bug or not?

[dhomo]

C:\Windows\System32>nslookup google.com 10.11.0.2
Server: adguard.local
Address: 10.11.0.2

DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
Non-authoritative answer:
Name: google.com
Addresses: 2a00:1450:4010:c06::8b
2a00:1450:4010:c06::66
2a00:1450:4010:c06::71
2a00:1450:4010:c06::64
64.233.163.102

C:\Windows\System32>nslookup google.com 10.11.0.1
Server: mikrotik-router
Address: 10.11.0.1

Non-authoritative answer:
Name: google.com
Addresses: 2a00:1450:4010:c06::8b
2a00:1450:4010:c06::66
2a00:1450:4010:c06::71
2a00:1450:4010:c06::64
64.233.163.102

the actual question is why is only the third request to adguard successful? is this a problem with adguard or with my system configuration?