Run Ensemble8 and navigate to the HTML Editor demo (in Controls).
Start editing the text.
Observe that when you click buttons on the toolbar (like Bold, Italic, etc.), the focus remains in the text area so you can continue editing the text.

Now use any of the controls that open a popup (e.g. a color chooser, or the Font combobox, etc.). Note that after the popup closes, the focus remains on the control itself, and so the user have to click on the text area manually in order to continue editing the text.

(This may be a Controls issue if the demo simply relies on focusability property of the controls.)