hi! i have same problem, but i don't have AAAA records in DNS, only A record.
Certbot failed to authenticate some domains (authenticator: webroot). The Certificate Authority reported these problems:
Domain: www.***.ru
Type: unauthorized
Detail: 2606:4700:3037::ac43:8e03: Invalid response from https://zumaoke.ru/
you should create separate thread: but why you need new certificate when you have one from Google Trust service?
Welcome to the Let's Encrypt Community! 
There appear to be two AAAA records for zumaoke.ru and www.zumaoke.ru.
Zumaoke is not my domain. My domain zoomgn.ru, but letsencrypt resolve zoomgn.ru to 2606:4700:3037::ac43:8e03:, where hosted online casino zumaoke.ru. looks like dns-spoofing
Looks like that's gone now, the normal cause of this is just leftover default IPv6 records when the domain gets setup at the registrar.
no looks like bad DNS. please fix glue
thanks for information, but dig from ns2.reg.ru returns only one A record, AAAA records not exists.
in letsencrypt now another address:
2606:4700:3030::6815:1001: Invalid response from https://thermocube.ru/
already wrote to support, waiting answer...
domain registered at 2025-04-11 and has one A record, tomorrow A record was changed.
thermocube.ru and zumaoke.ru both hosted on cloudflare and use their NS:
nserver: ada.ns.cloudflare.com.
nserver: koa.ns.cloudflare.com.
my domain on ns1.reg.ru and ns2.reg.ru...
Successfully received certificate.
Problem gone....
well it's reg.ru's problem that' they have wrong record about ns2.reg.ru on ru zone, so you'd better ask about them anyway
