Servers now working anymore

Not sure if this is the right place for this, but for one of my configurations, the servers are not working at all anymore. Other configurations (i.e. other servers), and Cloudflare DNS for example work just fine. 

These are the IPs in question. Pinging them works fine, but DNS resolutions just hang:

Not sure what to do at this point. 

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  • Please provide a diag

  • In the process of trying to run the diag tool, I have updated the NextDNS client on my firewall (Unifi USG), and thinks started working. Weirdly, they were not working before, even when I hardcoded the DNS server on my client device to the above two IP addresses. I am not sure what happened, or if those servers got fixed, but it seems all good right now. Thanks for the quick response!

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