将contentInset添加到正交滚动行为部分会导致倒数第二个单元格跳过

如何解决将contentInset添加到正交滚动行为部分会导致倒数第二个单元格跳过

我使用带有groupPagingCentered的正交截面进行了UICollectionViewCompositionalLayout，如下所示：

func neighborsRealitiesSection() -> NSCollectionLayoutSection {
  let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1),heightDimension: .fractionalHeight(1))
  let item = NSCollectionLayoutItem(layoutSize: itemSize)
    
  let cellWidth = UIScreen.main.bounds.width / 3 + 1
  let groupSize = NSCollectionLayoutSize(widthDimension: .absolute(cellWidth),heightDimension: .absolute(cellWidth))
  let group = NSCollectionLayoutGroup.vertical(layoutSize: groupSize,subitems: [item])
    
  let section = NSCollectionLayoutSection(group: group)
  section.orthogonalScrollingBehavior = .groupPaging
    
  let inset = (UIScreen.main.bounds.width - cellWidth) / 2
  section.contentInsets = .init(top: 0,leading: inset,bottom: 0,trailing: inset)
    
  return section
}

如果将contentInsets添加到该部分，则collectionView不会停止在倒数第二个单元格上滚动。它将滚动到下一个单元格。如果我对contentInsets发表评论，那没关系。

为什么会发生？有人有这个问题吗？