DNS issues for diff.rs domain (caused by expired DNSSEC keys?)

It looks like neither Google DNS nor Cloudflare resolve diff.rs correctly any longer, both return no results.

From what I can tell, this is caused by an expired DNSSEC key (from dig output):

$ dig diff.rs @1.0.0.1

...

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; EDE: 7 (Signature Expired): (for DNSKEY diff.rs., id = 25689: RRSIG diff.rs., expiration = 1747872000)
;; QUESTION SECTION:
;diff.rs.			IN	A