@Volkodav There is nothing we can do about your poor DNS behavior. We have seen odd things before with Yandex. You should try the HTTP Challenge methods or switch DNS providers.
Or, maybe try 1H or even longer DNS sleep. The TXT record must propagate through all the DNS Servers Yandex uses. Just because you see it on a panel doesn't mean that has happened.
"Wildcard" describes the name in the cert. You are not using a wildcard name today so you could use the HTTP method to get your same cert.
Wildcards are used when people have many subdomain name that change regularly. If you just use one or a small number of names that don't change much it is often easier to use HTTP Challenge.
There is no difference in security between a cert with a wildcard name and one that does not have a wildcard name.
If Iād had an idea of how long (I mean really long) the sleep time should have been set this would have been resolved nice and quick. Two good advices! Thank you