To my credit, in the Baby Your Baby classes we teach at the hospital we always talk about bumper pads. We discuss how technically they could be a suffocation hazard, although in the beginning, baby isn't going to roll around so the risk is minimal. But, we suggest removing them once baby can pull themselves up for sure. I guess some kiddos use them as a stepping stool to climb out of the crib.
So, I'm just trying to practice what I preach. Perhaps this is why she has trouble sleeping???