Issues with Secure DNS

Randomly today I was browsing the internet when all of the sudden I lost access to a bundle of websites. The ones I tested were facebook, google, google maps, and anything else google related. I ran a ping test (ping www.google.com) and I was getting no response at all. I then disabled my Secure DNS on my Avast Premier and then I was able to access those sites again. The ping result were also from another IP address. Is there something going on with Avast’s DNS servers?