Hide Folders Hierarchy - not working

I'm using CO8 for Mac and when I right-click on an image folder and choose Show Folders Hierarchy the folders expand as expected. When I then choose Hide Folders Hierarchy, ostensibly they should shrink back to the view I had before I did the Show, correct?

However, when I choose Hide Folders Hierarchy, nothing happens. That is, until I close CO8, reopen it, and see that the folder tree is now compressed again.

Does anyone else experience this? Mac or Windows or both?

Thanks.