I am trying to get my LO to sleep in the crib but she started rolling from back to tummy last week. Now, when I lay her in the crib she instantly rolls to her tummy and gets stuck since she hasn't figured out how to roll back. Any advice on how to keep her from rolling? Do I just wait it out until she learns to roll back over and restart the transition? The rolling has kind of put a stop to the crib transition.