does the lobby exist in the app or just on browser?
Although the question as to why is worth finding out.
In Android app it seems not to exist either
I also asked this question recently
I have discovered that the ping time through the browser sucks most of the time for me. However, if I start a game in the browser and then move it to the ipad, the ping time drops in half. this has saved a number of games NOT being lost because the server thinks I am not playing and thus not lose on time.