For me the lobby thing only happens if the game ends while your tapping. Thats why i only tap when theres less than 10 kills left. I can tap fine for up to two minutes per pull of the cord. I have a cable modem and a wireless router setup. So i just pull the ethernet from my wireless and that DCs me.
When you leave a game that you tapped in and You can't see anything in the lobby wait a few moments and everything will show up.