Thank you- Both of those things happen. There is always record of the forwarded call on Vestalink' end.
This is a problem that Google Voice has been having for 6 months or so now. It was noticed first with Callcentric DID's since Callcentric Free NY DID's are a popular option for Obi users to get E911. But I've experienced the issues on Anveo as well.
Google Voice uses companies to complete calls for them. One or more of these companies has a problem when connecting to some DID's. This results in calls taking too long to complete such that by the time your phone rings, google voice mail is already picking the call up and sometimes your phone doesn't even ring. Other times the issue shows up as incorrect CID, typically showing PRIVATE or Anonymous.
The problem occurs randomly in some cases and repeatedly in others. The problem seems to be related to the where the origin of the call comes from as well as the destination of the call.
To date, google has not officially recognized this as a problem and to my knowledge they are doing nothing to resolve this problem. One of the many benefits of "free" services.