The DNS check fails a lot, is it possible that there is some kind of quota or limit on the number of queries to the servers on which the TXT record is queried?
In my opinion it would be better if the query was made to the user's own server, for example to a .txt file hosted in the root directory of the web page and whose content was simply the pgp key fingerprint.
There are plans to indeed use a well-known file and/or a HTTP meta tag.
But still, the DNS shouldn't fail. I would expect that within the first hour as DNS records need to propagate. Does it still randomly fail?
I'm having it fail as well. On two domains.
And the lack of posts on this forum is a little concerning.
The thing is, I never have DNS fail on me so it's hard for me to replicate. Do you have a domain you wouldn't mind sharing that has this happen to it?