H.P.
This happened with all of my kids because somehow, they usually learn to go from back to front a few days before they can go front to back. You might have a few bad nights but in a day or two, she should be able to roll back the other way. At this point, TAKE AWAY the sleep positioners. If she is not great at rolling, you don't want her to suffocate on that. Sleep positioners are pretty dangerous to have in the crib especially when they are rolling around.