In Qt Quick, clicking outside a modeless popup that has the CloseOnPressOutside set always makes the press pass through the overlay to the item underneath, activating buttons.

For desktop platforms, this is only the behavior on Windows; on macOS and Xcb, such presses should not reach the item under the mouse. Qt abstracts that platform specific behavior into the ReplayMousePressOutsidePopup style hint, which is however not respected in Qt Quick.