pfSense

This doesn't appear to be a bug. You have a FQDN or Hostname entry added as an Alternative Name, but nothing defined in the field. If you select Delete next to the button for the unpopulated field, does it not let you save?

I just realized that if I just enter the type of IP address and value of 10.0.0.2 and not click add, just save then 1 SAN entry will be added. This is a bit confusing because the presence of the value field determines whether the SAN entry will be saved or not and this is confusing, at least it confused me. Maybe better documentation on the page would be helpful.

Jim Pingle wrote in #note-4:

The "Add" button adds a new row to the form, it doesn't save or take any other action. It's working as intended and it works identically to the same type of form throughout the GUI.

That said, the form could ignore blank entries so users don't get hung up here.

Sorry I was not clear. I wasn’t aware that by simply filling the value field when I click save a SAN entry would be created. I thought that in order to create a SAN entry I had to click add, fill in the fields, and when I click saved, it would save one entry.

What made me think this is the fact that the type field is filled in with a default value of FQDN or hostname and that does not cause an entry to be created only if you fill in the value field. You can leave the behavior as is but you should have a message on the page to clarify. 1 message about the behavior on save and another message about only clicking add if you need more than 1 SAN entry. Hope this is clearer.