TB shuts off when started

My wife says that when she starts up her TB in the morning then walks into the house to get the baby. By the time she gets back out to the TB it has shut off. This dose not happen all of the time only about 3 or so times a month. Dose anyone else have this problem or dose anyone have a solution.

:confused:

Dose anyone have any ideas. I also for got to mention that it is a 2002 LTZ TB