Sometimes, a window that must be acknowledged and closed first ends up behind another window that must be acknowledged and closed second. If the user is unaware or inattentive to the windows’ order or placement, then user may become perplexed as to way a window seems disabled (unable to be acknowledged and closed).
Suggestion: A window that must be acknowledged first should be made to float (always in front of) a window that must be acknowledged second.
Though it’s easier on the eyes, I’ve turned off dark mode in Dorico, because the window boundaries are much harder to notice and it’s easier to click on an unintended window, which can easily lead to the scenario described above.