respawn_delay does not delay the respawn! [closed]

edit

There's a new .launch element (only in Indigo) that delays the repawn of a node. However, it doesn't do what it says.

This is a demo part of the .launch file I have: Is there anything I'm missing?

<node pkg="res_prj" type="init_tf_broadcaster" name="init_tf_br"
 respawn="true" respawn_delay="20"/>

I expect the node init_tf_br respawn after 20 secs, but it starts immediately once it dies.

Thanks in advance.

Reference: http://wiki.ros.org/roslaunch/XML/node