I use NordVPN and they have their own DNS servers (22.214.171.124 and 126.96.36.199). But after reading about 188.8.131.52 being the fastest DNS server, I changed my DNS to that. However, sites are now taking longer to resolve. Why is that? Also, if my DNS request is encrypted by the VPN, at which point does it get decrypted and how? Who has access to the decrypted request?