Help window won't keep focus in 8.5

While working in the 8.5 composite app editor with Help open I note that clicking on Help in the task bar brings Help to the front, and then Designer comes immediately back to the fore. I have to click on Help four or five times to get it to stick. This happens every time. It is as if each pane (palette?) in Designer thinks it has the focus, and each has to be persuaded separately to give up the focus.