Right-hand sidebar altered

I’m using the latest version of DT3 (Beta 7). A couple times today through normal use (perhaps search in emails) the appearance and functionality of the right-sidebar seems to change.

  1. Consider the normal appearance from my perspective:

  2. Instead I get this appearance just recently after a search in the apple mail archive

Is it a bug or have a missed something instead ?

What’s selected in the current view? The screenshot unfortunately doesn’t show this.

Don’t remember other than the search in the mail archive, deactivation of the search and returning to the original window. Can you think of any situation that would lead to this type of display ?

Only the obvious one right now that there’s indeed no selection.