Chapter 4: Beginning Message Apps (Expanded View)

On the stickerlicious app, when you click the arrow in the lower right corner of the messaging app and expand the stickerlicious messaging app to show a larger view of the collectionview, the headers do not reposition correctly. The top header doesn’t position itself at the top and when you scroll, the stickers scroll under the header. For some reason, it doesn’t seem to know where the top of the view is. Does anyone know how to correct this?