iOS 6.1, Available Today, Adds Features to Siri

Damn, that's some good support right there. I have a very very similar problem but it only happens when I put the screen to sleep. The wifi icon dissapears when the screen is off - I know this becuase as soon as I turn it on, the wifi icon is missing, and takes usually .5 - 2 seconds to come back on, I realise this might be for power saving, BUT, sometimes when this happens, the device loses its network connection, and I can't get text messages or anything like that. Haggard, do you have a support document that can assist me?