Letsencrypt doesn't verify dns-01 and leaves challenge in status: pending state

Issuance Tech
15

And another one:

ftp.tbbis.beep.pl
https://acme-v01.api.letsencrypt.org/acme/challenge/g7qWBo2Vmkr7ntD59APOXuN1YLlbcv0h4EN0XY-CHqk/15440948668

(not pasting full logs as above url should make it easy to get all data)

Isn’t this some major problem unnoticed by letsencrypt users?

Because if we hit it so often then it has to be a major problem on global level for dns-01 users (or there is some special case why we hit it that often).