kasp test fails with "unexpected CDS record in response for key 34330"

kasp test from BIND 9.15.6 failed on FreeBSD 11.3 with:

I:kasp:check CDS rrset is signed correctly for zone step2.csk-roll.autosign (382)
I:kasp:error: unexpected CDS record in response for key 34330
I:kasp:failed

I have the kasp/ directory from the affected machine stored locally, should there be an interest in output files.

At least here's the dig.out.ns3.test382 file content:

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44321
;; flags: qr aa rd; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 4096
; COOKIE: 4d28de6d250ab599010000005dd3cbca53d99ec412172e8e (good)
;; QUESTION SECTION:
;step2.csk-roll.autosign.	IN	CDS

;; ANSWER SECTION:
step2.csk-roll.autosign. 3600	IN	CDS	26298 13 2 70719B8AE07F584C4B13094E74271425A4865D46C69DD16284EDFF71 A9F689A0
step2.csk-roll.autosign. 3600	IN	RRSIG	CDS 13 3 3600 20191203110211 20191119100211 26298 step2.csk-roll.autosign. rdyQJ5TyzPc47kflwv7L4bywntflnnSfW4STgPqlxbC8ukaFaOFoYXp3 86zbOMAH3Mi3+zSrKJpTudJef8UUiw==
step2.csk-roll.autosign. 3600	IN	RRSIG	CDS 13 3 3600 20191203110211 20191119100211 34330 step2.csk-roll.autosign. dDt63SG137F1m/ZUaP814PeL6EOn819gW7CHfUuZdW21wmeHdEk6+Deo 9FH8FVI/K5Ni4bsA1TimlVwG0gUtvA==