My DDNS subdomains on DuckDNS have been failing to resolve for the last 1-2 weeks, only very occasionally succeeding. In most instances I get SERVFAIL in DNS logs. Their service dashboard (http://www.duckdns.org) loads sometimes but has also been flaky (failed to resolve when I tried earlier), though it provides no useful information about service health.
https://dnschecker.org/ shows propagation issues- most regions show red "x" marks.
Anyone know what's going on with them?