The domain was successfully added to the service, after a short time it stopped working, that is, it does not respond at all and issues (DNS_PROBE_FINISHED_NXDOMAIN) …
I can’t understand why this is happening. And even on those domains that have the same answer for a long time. If in Windows in the file c: \ Windows \ System32 \ drivers \ etc \ host register the server ip, then everything works fine.
I can not understand why cloudflare does not work.