Changed behavior of "pop-up" folders

In versions of DEVONthink prior to 1.9.3, when I dragged a new page to a folder two levels down in a hierarchy, the top level folder would pop-open and then close after I dropped the new page on the desired destination subfolder. This is exactly how I wanted it to be.

Now, in 1.9.3, the hierarchy does not pop-close.

Is this a settable option? Is it a new feature? Is it a bug?