Today is happening to me on a link from another thread which was to https://archive.is/gwuFp
DNS is the unsecured quad9 9.9.9.10
Secure DNS is likewise https://dns10.quad9.net/dns-query
Console shows error 429
When I get captcha'd, the archive.is resolves to 198.23.187.186
I cleared my DNS server cache and got new IPs for archive.today and archive.ph but the same address for archive.is. I tried the OPs link, got redirected to .is and got captchas.
I cleared DNS server cache again and got 89.253.237.217 for .is (along with more new IPs for .ph and .today). No captchas.
Google DNS and others work where Cloudflare does not.