using --dry-run and multiple domains gives namecheap._ApiError

[knoxell]

When requesting a certificate for two domains with --dry-run I get

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Simulating a certificate request for *.example.tld and example.tld
Remote: 3
To set: 4
Remote: 4
To set: 5
Waiting 60 seconds for DNS changes to propagate
Remote: 5
To set: 4
Encountered exception during recovery: lexicon.providers.namecheap._ApiError: 1 - Did not receive 200 (Ok) response
The dry run was successful.

I don't really know what I should do, both domains work individually, without error.

And the most bizarre thing without --dry-run there is no error! (--test-run is probably affected aswell)

I'll probably leave this alone because it doesn't effect requesting certificates.

If anyone wants to investigate, feel free to post your findings here. Pull requests are welcome aswell.