Searching doesn't work when top level mail folder is selected

Steps to reproduce:

  1. Select a top level folder such as Smart Folders.

  2. Press Ctrl+Shift+F.

  3. Perform a search.

Result:
The search doesn’t function.

What happens? Does the search window open?

Yes, the search window opens, but when you press the Enter key or Search button, nothing happens.

Are you implying that you can’t reproduce the problem?

It works perfectly OK for me. Can you please send me a screenshot of the window right before you press the Enter key? Thank you.