prevent roomlist updates: Updatable='false' not working?

[arjeng]

I have one persistent room, the lobby, which all users join. When starting a game I create a gameroom from the roomplugin associated with the lobby.
However, I don't want this to trigger a roomlist update.

In my configuration.xml I have the 'Updatable' attribute set to 'false'.

However, I still receive roomListUpdated messages of all update types. Is this a bug? Should the attribute be named otherwise?

thanks in advance.