Local DNS Records only working on some devices

[yubiuser]

You advertise not only Pihole's IP as DNS server via DHCP but also other. As clients decide on their own which DNS to choose they might not be able to resolve internal DNS records via a public server.

      dns-server: 192.168.3.14
      dns-server: 1.1.1.1
      dns-server: 1.0.0.1

Why should Pi-hole be my only DNS server?

Reduced Ad Blocking Capability The main reason you should Pi-hole as your only DNS server is that you will see increased performance in the blocking of ads. If you have two DNS servers (Pi-hole and something else), your network clients may not always query Pi-hole for name resolution. If a query happens to be answered from a non-Pi-hole DNS server, your block lists will not apply (since that DNS server doesn't know about them). All Queries Need To Go Through Pi-hole First Since other DNS serv…