After we upgraded to patch 12 it appeared to work fine at first, but we found that clicking on the Storage and Hardware tiles caused a long pause in the client...haven't timed it but around 2-3 minutes. Usually without filling out the data on the screen (like it timed out the connection). Other areas seem unaffected.
We contacted support who immediately said to connect via https://FQDN
instead of a direct database connection (SERVERNAME).
Support said: "Patch 12 has some new security settings and I have found that changing the server login to https://fqdn
seem to make it work better." Not sure what that means but it sounds like a bug to me...