On a collectionView with Paging enabled, scrollToItem does not work

Code Block 
class HomeCVColumnFlowLayout: UICollectionViewFlowLayout {
    var cellsPerRow: Int
    let type : String?
    override var itemSize: CGSize {
        get {
            guard let collectionView = collectionView else { return super.itemSize }
            let marginsAndInsets = sectionInset.left + sectionInset.right + minimumInteritemSpacing * CGFloat(cellsPerRow - 1)
            let itemWidth = ((collectionView.bounds.size.width - marginsAndInsets) / CGFloat(cellsPerRow)).rounded(.down)
            let itemHeight = collectionView.bounds.size.height - sectionInset.top - sectionInset.bottom
            return CGSize(width: itemWidth, height: itemHeight)
        }
        set {
            super.itemSize = newValue
        }
    }
    init(cellsPerRow: Int, minimumInteritemSpacing: CGFloat = 0, minimumLineSpacing: CGFloat = 0, sectionInset: UIEdgeInsets = .zero, type: String = "") {
        self.cellsPerRow = cellsPerRow
        self.type = type
        super.init()
        self.scrollDirection = UICollectionView.ScrollDirection.horizontal
        self.minimumInteritemSpacing = minimumInteritemSpacing
        self.minimumLineSpacing = minimumLineSpacing
        self.sectionInset = sectionInset
    }
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    override func invalidationContext(forBoundsChange newBounds: CGRect) -> UICollectionViewLayoutInvalidationContext {
        let context = super.invalidationContext(forBoundsChange: newBounds) as! UICollectionViewFlowLayoutInvalidationContext
        context.invalidateFlowLayoutDelegateMetrics = newBounds != collectionView?.bounds
        return context
    }
    override func targetContentOffset( 
        forProposedContentOffset proposedContentOffset: CGPoint, withScrollingVelocity velocity: CGPoint) -> CGPoint {
        guard let collectionView = collectionView else { return proposedContentOffset }
        let pageWidth = itemSize.width + minimumLineSpacing
        let currentPage: CGFloat = collectionView.contentOffset.x / pageWidth
        let nearestPage: CGFloat = round(currentPage)
        let isNearPreviousPage = nearestPage < currentPage
        var pageDiff: CGFloat = 0
        let velocityThreshold: CGFloat = 0.5 
        if isNearPreviousPage {
          if velocity.x > velocityThreshold {
            pageDiff = 1
          }
        } else {
          if velocity.x < -velocityThreshold {
            pageDiff = -1
          }
        }
        let x = (nearestPage + pageDiff) * pageWidth
        let cappedX = max(0, x) 
        return CGPoint(x: cappedX, y: proposedContentOffset.y)
      }
}

Code Block 
   func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout,   
   sizeForItemAtindexPath: IndexPath) -> CGSize { 
        let cellsAcross: CGFloat = 1
    	let spaceBetweenCells: CGFloat = 1
   		let dim = (self.cvImageViewer.bounds.width - (cellsAcross - 1) * spaceBetweenCells) / cellsAcross
    	return CGSize(width: dim, height: self.cvImageViewer.bounds.height)
  }