Motorola Atrix 4G :: Screen Lock Up During Re-awakening From Sleep Mode

I am currently having issues with my Atrix 4G since the start of the New Year (2012). I have had the phone since July with no problems, but not i hear and sense feedback, but it takes over a minute for the phone to reawaken from sleep mode (screen to turn on to the unlock screen).

Once it does, I see the cellular signal strength icon showing it was disconnected and trying to re-acquire the cell netwrok (not the wifi part, the AT&T part).

This long delay puts a real damper on how I can use the phone to make a quick call, or snap a random photo to capture a moment.

Once I'm in, however, it'll work fine for a while, and then if I am NOT using wifi, it may lock up the screen refresh (I get haptic and audio feedback on my taps until the buffer fills, but screen freezes and even turing the unit off does not shut the screen) and sometimes it'll be minutes before I see the cell signal thing do the same thing, or I just get tired of waiting and pull the battery.

if this is a settings thing or a hardware or OS issue. My phone is under warranty, but I don't want to swap it out without knowing if there's a fix. I hate to get a new phone and find out it's happening again.