At the top of this thread you said the auth and challenge were both "processing". But, in your post at the CA Comparison thread (here) you have 'pending' for the Auth and 'processing' for the Challenge. Snip here:
Auth:
'identifier': {'type': 'dns', 'value': 'dev.aptise.com'},
'status': 'pending',
Challenge:
'status': 'processing',
'token': 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',
'type': 'http-01',
'url': 'https://api.test4.buypass.no/acme/authz/XXXXXXXXXXXXXXXXXXXX/1',
I posted a sequence in that CA Comparison thread showing that Buypass automatically revalidated the "pending" / "processing" (after 10 minutes) and went to "valid".
I posted there as an update for Ryan's table which said no CA other than ZeroSSL did that.
A discussion of all oddities of Buypass might get a bit long so thought I'd post here