If my baby has started to roll over in the Magic Sleepsuit, should I transition him/her out of it?

Yes.  The Magic Sleepsuit is designed for back sleeping in the crib. It is not to be used for tummy sleeping. If your baby has started to roll over IN the Magic Sleepsuit while sleeping, then it is time to transition him or her out of it.  This is typically a sign that babies are ready for the next stage of having more freedom of movement in their sleep.