“Add” button

Has the “Add” button in the Font Info > Master stopped working? As far as I remember, it makes settig up multiple masters easier but it does not do anything when I use it now (while other single-master fonts are open). Is it a bug?

10.8.5; 1.3.26 [533]

It still works for me; I used it on Friday.

This is a bug. Will fix it.