I have a simple window with a toolbar, page panel control, and a container control in each of the two page panels. When the window first opens, it really appears like the page panel control has a focus ring - which should not be possible, right?
Could you share your searchfield? I have this, too, in some windows where I was able to finagle the blasted focusring away. But I now have a searchfield in my main window where no setting the focus anywhere make the focusring go away. I find this super annoying.