DNS Servers Error

Has anyone else had issues, over the last week or so, where the dns servers aren't reachable? This is the first time that I've had this issue in the 5 years that I've been using NextDNS, but I am worried about how often this is happening. I use ping.nextdns.io to check the status of the servers and often I see multiple errors - when I am having DNS issues - and it takes 5 to 10 minutes for the errored servers to start pinging.

i am just wondering if anyone is seeing the same thing. If there has been any communication about these issues.