Hello! My DNS record was unresponsive for several hours after a lot of traffic to my site. nslookup reported that there is no response to this address, although all entries in the control panel were active. After a few hours, everything worked as before. With what it can be connected?
May I ask what is your domain name?
Has this been resolved, or you still have some issues?
May I ask what so far have you changed?
The domain nameservers at your domain registrar or?
If so, likely the issue could be related to the DNS propagation which may take up to 24-48 hours to be completed.
Or rather switched from to for some DNS records at Cloudflare dashboard?
Furthermore, before moving to Cloudflare, was your Website working over HTTPS connection?
May I ask what SSL option have you got selected under the SSL/TLS tab at Cloudflare dashboard for your domain ( Flexible, Full, Full Strict … )?