Since upgrading Certificate Hub and clients to 7.0.14.0, when going to "new" on the left hand side, for a new certificate, the "target instance", instead of showing the list of attached servers, it shows a single GUID.
To resolve it, you must click away to another screen, such as summary, and then go to instances, and click on an instance, then click the plus at the top right for a new.
Refreshing the page makes this occur again.