Consistent 500 urn:acme:error:serverInternal: Error creating new cert

Since the last rollout (to be precise: 2017/11/02 10:35:07 PT) we’ve started observing consistent failures when trying to fetch a cert (after successful authorization) for all subdomains of certsbridge.com.
All of these fail with 500 urn:acme:error:serverInternal: Error creating new cert

All other domains are working fine.

Could you take a look?

Replied OOB but for posterity we’re looking into this. Thanks