I was just trying to post a message about this same issue, but the Support site would not allow my post (kept error-ing out). Anyway, glad to see this issue was posted now.
See my attachment, to see the issue that Vladimir is talking about.
This is broken and needs to be fixed.
Same issue using various browsers (Internet Explorer, Firefox, etc).
Still not working for me. I tried deleting some of my browser cookies and such, in case I was getting an old version of the page, but I'm still having the issue.
And suddenly, now it seems to be working for me. It did change though, from what it was before. Now, when I start typing, a cascade-list drops down from that field.
(again though, this was not working for me, just a few minutes ago - something must have updated for me).