Motorola Atrix 4G :: Proximity Sensor Quits Working With Gingerbread

After the gingerbread update I found that the proximity sensor would quit workng and the only solution was to restart the phone. I found that using bluetooth caused this behavior (repeated several times) by getting it to fail (although not every time) using the following sequence.

1. Power down and restart the phone (so that it was in a known state)

2. Call voice mail to confirm that the proximity sensor was working

3. Turn on blue tooth.

4. Turn off blue tooth. (didn't use it in between other then to connect with headset)

5. Call voice mail and proximity sensor would not work.

6. Cycle power on phone

7. Call voice mail and proximity sensor would work.

My solution was to quit using bluetooth and have not been using since the first week I updated to gingerbread. I did have the sensor quit working one time since but didn't think much of it until my daughter-in-law told me she had the same problem and she doesn't use bluetooth but she does use the speaker phone much more than I do. I believe that both speaker phone and bluetooth functions disable the sensor while in use. Is it possible that it is not always getting re-enabled? I have seen other posts concerning the proximity sensor not working but have not seen a tie to bluetooth use.