Lumia 920 Proximity sensor is on crack

Do any of you guys have a really annoying bug with your Lumia 920's where the screen immediately blacks out when you make a phone call? I hit the wake button but the screen just flashes for a second and goes black again. The call will still be going this whole time. I looked on the Nokia forums and there are hundreds of people with the same problem. Restarting/resetting does nothing. This bug is actually really major because it completely breaks the whole "phone" functionality of my phone.

Should I get it replaced or what? I doubt AT&T will help me out on this one.