I have heard of a few cases of this too, but more like working intermittently like mine.
Mine sometimes goes off if I am using it @ 40mph in 5th. It might go out at about a minute after engaging too. I am starting to think that this may have to do with the clutch engagement sensor (as in being highly sensitive)
When you do take it in....do please find out what the culprit is, as I am very curious.
good luck