Auto-suggest menus are showing focus when they do not have it

D&D a Button
Click inside the Style property textField - BUG - the auto-suggest menu appears but focus is shown on the TextField AND the auto-suggest menu (see screenshot). Focus is only ever shown on one item. In this case, the TextField should have focus as it is where we clicked. Focus can only be passed to the auto-suggest menu by the mouse or hitting the down arrow or tab keys.