2019 comment from Cloudflare: https://news.ycombinator.com/item?id=19828702
At home I use Cloudflare in general, but using AdGuard Home I send requests for archive sites to AdGuard instead, and I don't get a captcha anymore.
# Archive
[/archive.today/archive.ph/archive.is/archive.li/archive.vn/archive.fo/archive.md/]tls://unfiltered.adguard-dns.com
"Archive.is’s owner is intentionally blocking 1.1.1.1 users." https://jarv.is/notes/cloudflare-dns-archive-is-blocked/
edit: sorry, to answer your question: I see the same