Windows do not remain on their virtual desktop when resolution changes

[Gozea]

My setup is a Thinkpad X230 convertible tablet which I dock and undock frequently and switch to tablet (ie portrait) orientation regularly.

While I have kind of accepted that the window locations on a single desktop get messed up when I change the resolution (by docking, undocking or switching orientation), Unity keeps messing up the whole window-to-desktop mapping, moving windows across virtual desktop borders, kind of defying the whole point of virtual desktops. Instead, windows should remain on the virtual desktop they have been set to.