Sometimes when accessing a menu, the new window will be place in the very top left. So much so that access to the window top bar is impossible (the top of the window seems to be under the apple menu (z plain)), meaning that one cannot move the window to where one wants. Sometimes closing and reopening the menu will place the window so that access to the window top bar is possible (the window is just below the apple menu (y plain)), although it is still top left.