UICollectionView - Changing UI of one specific cell causes changes for every fifth cell

Code Block Swift
private func configureDataSource() {
        let cellRegistration = UICollectionView.CellRegistration<SearchTweetsCell, Tweet>{ (cell, indexPath, tweet) in
            cell.set(with: tweet, user: self.user)
            cell.delegateSafari = self
        }
        dataSource = UICollectionViewDiffableDataSource<Section, Tweet>(collectionView: collectionView, cellProvider: { (collectionView, indexPath, tweet) -> UICollectionViewCell? in
            return collectionView.dequeueConfiguredReusableCell(using: cellRegistration, for: indexPath, item: tweet)
        })
        dataSource.supplementaryViewProvider = { (collectionView, kind, indexPath) in
            let header = collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: SearchTweetsVCCollectionHeader.reuseId, for: indexPath) as! SearchTweetsVCCollectionHeader
            header.set(with: self.user)
            return header
        }
    }

Not sure what do you mean by the "definition of the cell class"?

Code Block 
import UIKit
// MARK: - Protocols and Delegates
protocol SearchTweetsCellDelegates: class {
    func didRequestSafari(with urlString: String?)
}
final class SearchTweetsCell: UICollectionViewCell {
    // MARK: - Declarations
    static let reuseId          = "cell"   
    let addToFavoritesButton    = UIButton()
    var timeDateLabel           = UILabel()
    let tweetBodyLabel          = UserSearchVCTextView()
    var mediaStackView          = UIStackView()
    let seeOnlineButton         = UIButton()
    var sharesView              = CellMediaInfoView()
    var likesView               = CellMediaInfoView()
    var goSafariButton          = GoSafariButton()
    weak var delegateSafari:    SearchTweetsCellDelegates!
    var tweet:                  Tweet!
    var user:                   User!
    var urlString:              String?
    // MARK: - Initialise & Override
    override init(frame: CGRect) {
        super.init(frame: frame)
        configureCell()
        configureUIElements()
        layoutUI()
        configureMediaStackView()
        configureGoSafariButton()
    }
    override func prepareForReuse() { self.goSafariButton.isHidden = false }
    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }
    // MARK: - @Objectives
    @objc private func addToFavoritesTapped(sender: UIView) {
        animateButtonView(sender)
        let favorite = fromTweetToFavoriteTweet(user: user, tweet: tweet)
        PersistenceManager.updateWithTweets(favoriteTweet: favorite, persistenceAction: .add) { [weak self] (error) in
            guard self != nil else { return }
            guard let error = error else {
                print("sucess")
                return
            }
            print(error.rawValue)
        }
        self.addToFavoritesButton.isEnabled = false
    }
    @objc private func didTapGoSafariButton(_ sender: UIView) {
        delegateSafari.didRequestSafari(with: urlString)
    }
    // MARK: - Animations
    private func animateButtonView(_ viewToAnimate: UIView) {
        UIView.animate(withDuration: 0.2, animations: {viewToAnimate.alpha = 0}) { [weak self] (true) in
            guard let self = self else { return }
            switch true {
            case true:
                DispatchQueue.main.async { self.addToFavoritesButton.setImage(SFSymbolsAsImg.checkmark, for: .normal) }
                UIView.animate(withDuration: 0.2, animations: {viewToAnimate.alpha = 1} )
            case false:
                return
            }
        }
    }
    // MARK: - Called outside 
    func set(with usersTweet: Tweet, user: User) {
        self.user                               = user
        tweet                                   = usersTweet
        urlString                               = usersTweet.urlToExpandWithSafari
        tweetBodyLabel.text                     = usersTweet.tweetText
        timeDateLabel.text                      = usersTweet.createdAt.formatToTwitterPostDate()
        sharesView.set(itemInfoType: .shares,   with: usersTweet.retweetCounter.convertToKMFormatStr())
        likesView.set(itemInfoType: .likes,     with: usersTweet.likesCounter.convertToKMFormatStr())
        if tweet.urlToExpandWithSafari == nil { goSafariButton.isEnabled = true }
        self.goSafariButton.setTitle(TweetStrings.seeFull, for: .normal)
    }
    // MARK: - Cell Configuration
    private func fromTweetToFavoriteTweet(user: User ,tweet: Tweet) -> FavoriteTweet {
        let favoriteTweet = FavoriteTweet(twitsId: tweet.twitsId,
                                          name: user.name,
                                          tweetText: tweet.tweetText,
                                          profileImageUrl: user.profileImageUrl,
                                          urlToExpandWithSafari: tweet.urlToExpandWithSafari,
                                          likesCounter: tweet.likesCounter,
                                          retweetCounter: tweet.retweetCounter,
                                          createdAt: tweet.createdAt)
        return favoriteTweet
    }
    private func configureCell() {
        backgroundColor                     = .secondarySystemBackground
        layer.cornerRadius                  = 15
    }
    private func configureGoSafariButton() {
        goSafariButton.addTarget(self, action: #selector(didTapGoSafariButton), for: .touchUpInside)
    }
    private func configureMediaStackView() {
        mediaStackView.axis                 = .horizontal
        mediaStackView.distribution         = .equalSpacing
        mediaStackView.alignment            = .center
        mediaStackView.addArrangedSubview(sharesView)
        mediaStackView.addArrangedSubview(likesView)
    }
    private func configureUIElements() {
        timeDateLabel.textColor             = .systemGray
        timeDateLabel.textAlignment         = .center     
        addToFavoritesButton.setImage(SFSymbolsAsImg.plus, for: .normal)
        addToFavoritesButton.tintColor      = ColorsTwitter.twitterBlue
        addToFavoritesButton.addTarget(self, action: #selector(addToFavoritesTapped), for: .touchUpInside)
    }
    // MARK: - Layout Configuration
    private func layoutUI() {
        addSubviews(addToFavoritesButton, timeDateLabel, tweetBodyLabel, mediaStackView, goSafariButton)
        tamicToFalse(addToFavoritesButton, mediaStackView, timeDateLabel)
        let mediaLeadingPadding: CGFloat = DeviceTypes.isiPhoneSE || DeviceTypes.isiPhone8Zoomed ? 10 : 30
        let mediaWidthMltp: CGFloat = DeviceTypes.isiPhoneSE || DeviceTypes.isiPhone8Zoomed ? 0.55 : 0.5
        NSLayoutConstraint.activate([ ... ])  // Removed from the post for less text 
  }
}

Code Block 
    override func prepareForReuse() {
        self.goSafariButton.isHidden = false
        addToFavoritesButton.isEnabled = true
        addToFavoritesButton.setImage(SFSymbolsAsImg.plus, for: .normal)
    }

On top of that, animation does not finish. Alpha goes to 0, and then the image is being changed, alpha should go to 1 but never gets there. It stops somewhere between 0.7-0.8.

Code Block 
        self.addToFavoritesButton.isEnabled = false

Add var favorite: Bool parameter to my struct. 
When the data of a tweet is fetched from JSON, set favorite's default value to false. 
When the button addToFavorite is pushed, toggle favorites value to true and save that object with some persistence manager,
Then, every time data is fetched again for the same user to get his/her tweets, do a check if the tweet exists in persistence manager with the favorite parameter set to true, and if it does, set its UI accordingly?