Bug? Shouldn’t clicking on a button a second time close the associated dropdown?

Bug? Shouldn’t clicking on a button (Display | Styling | Filter | Presets) a second time close the associated dropdown?

Do I have to choose something from the dropdown to close? Sometimes the dropdown disappears if I move cursor and change focus, other times not so much… Behavior seems a little eccentric.

MacBook Pro M5, current OS, current Causality ver