xwit cannot de-iconify window

The xwit command (from package xwit) provides a simple command-line interface for de-iconifying and raising an X window. However, it doesn't work for iconified windows in Unity. (It does work with other window managers, even Unity 2D.) xwit simply calls XMapRaised(3) on the specified window.

Steps to reproduce:

1) Install the xwit package.
2) Open a terminal, and get its windowid with "echo $WINDOWID". Record this number.
3) Minimize the terminal window.
4) Open a second terminal window instance. Run "xwit -id <windowid>"

Expected behavior: The minimized terminal window should be de-iconified and raised.
Actual behavior: Nothing happens in Unity. (But this does work in Unity 2D and most others.)

This is on Ubuntu 12.04 with the following package versions:

unity 5.16.0-0ubuntu1
compiz 1:0.9.7.8-0ubuntu1.4
xwit 3.4-14