It seems to me that the DNS is veeeeeery slow to respond (and that's the reason for the first request after "cache time" to fail) but eventually the answer arrives and the next one (and any pings) arrive correctly.
I don't seem to have problems on my other websites (on the same host) so that should be ok on that side.
I did a new recursive DNS test and this time the result is:
I guess it's definitely a (temporary) problem on zonomi's side (which is the authoritative DNS for
monotone.ca).
Also, some other people is noticing it:
It seems they were DDoS'ed last week, so I guess that what "again" is referring to:
--
Lapo Luchini