having issues with cached table viewcells - swift

Question

I have the following code
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{
let cell = tableView.dequeueReusableCell(withIdentifier: "book", for: indexPath) as! BookTableViewCell
cell.cellIndex = indexPath
cell.dataSource = self
cell.delegate = self
cell.backgroundColor = UIColor.white
var books = [Book]();
let count = self.enterpriseBooks.count;
if count > 0 && indexPath.section < self.enterpriseBooks_2.count {
books = self.enterpriseBooks_2[indexPath.section]!;
}
if (indexPath.section == (count)) {
books = nytbooks;
} else if (indexPath.section == (count + 1)) {
books = trendingbooks;
} else if (indexPath.section == (count + 2)) {
books = newbooks
}
if (books.count > 0) {
if (cell.collectionView === nil) {
cell.addCollectionView();
cell.collectionView.tag = 124;
cell.collectionView.reloadData()
}
}
return cell
}
// BookTableViewCell
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionCell", for: indexPath as IndexPath) as! BookCollectionViewCell
self.dataSource?.getData(cell: self)
let books = self.books
let book = books?[indexPath.row]
if book != nil {
cell.label.text = book?.title
cell.imageView.sd_setImage(with: URL(string: book?.image as! String), placeholderImage: nil)
}
return cell
}
func addCollectionView () {
let flowLayout = UICollectionViewFlowLayout()
flowLayout.scrollDirection = .horizontal
flowLayout.itemSize = CGSize(width: 100, height: self.frame.height)
//You can also provide estimated Height and Width
flowLayout.estimatedItemSize = CGSize(width: 100, height: self.frame.height)
//For Setting the Spacing between cells
flowLayout.minimumInteritemSpacing = 25
flowLayout.minimumLineSpacing = 20
let cellReuseIdentifier = "collectionCell"
self.collectionView = UICollectionView(frame: CGRect(x: 10,
y: 0,
width: self.frame.width,
height: self.frame.height),
collectionViewLayout: flowLayout)
self.collectionView.showsHorizontalScrollIndicator = false
self.collectionView.translatesAutoresizingMaskIntoConstraints = false
self.collectionView.backgroundColor = .clear
self.collectionView.delegate = self
self.collectionView.dataSource = self
self.collectionView.register(BookCollectionViewCell.self, forCellWithReuseIdentifier: cellReuseIdentifier)
self.backgroundColor = UIColor.white
self.addSubview(collectionView)
}
The issue is I'm running into caching issues where content in a table view cell or collection view cell are overlapping with each other. Can anyone please help?
The above content shows images horizontally aligned into three rows using collection views for each.