Some GADUnifiedNativeAdViews Are Not Clickable (AdMob/Swift)

I am implementing AdMob’s Native Advanced ads into my iOS app. I use a UICollectionViewCell that contains a GADUnifiedNativeAdView​ and from there, I set up my ads in the viewDidLoad() and cellForItemAt()​…

The Code

override func viewDidLoad() {
        let adUnitID = "ca-app-pub-3940256099942544/3986624511"
        let numAdsToLoad = 5
        let options = GADMultipleAdsAdLoaderOptions()
        options.numberOfAds = numAdsToLoad
        
        let adOptions = GADNativeAdViewAdOptions()
        adOptions.preferredAdChoicesPosition = .topRightCorner
        
        adLoader = GADAdLoader(adUnitID: adUnitID, rootViewController: self, adTypes: [.unifiedNative], options: [options, adOptions])
        adLoader.delegate = self
        adLoader.load(GADRequest())
}

func adLoader(_ adLoader: GADAdLoader, didReceive nativeAd: GADUnifiedNativeAd) {
        nativeAds.append(nativeAd)
}
    
func adLoaderDidFinishLoading(_ adLoader: GADAdLoader) {
        collectionView.reloadData()
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "onlineAdCell", for: indexPath) as! OnlineAdCollectionViewCell

        let nativeAd = nativeAds[onlineAdIndex()]
        nativeAd.rootViewController = self
        (cell.adView.headlineView as! UILabel).text = nativeAd.headline
        (cell.adView.callToActionView as! UILabel).text = nativeAd.callToAction
                   (cell.adView.imageView as! UIImageView).image = nativeAd.images?.first?.image
                    cell.adView.imageView?.contentMode = .scaleAspectFill
        cell.adView.callToActionView?.isUserInteractionEnabled = false
        cell.adView.nativeAd = nativeAd
        return cell
}

The Problem

So this works almost perfectly. The problem is that, for whatever reason, only some of the ads are actually clickable. So here’s what a clickable ad looks like in my UI:

and here’s what a non-clickable ad looks like:

As you can tell the only difference is the ad info icon in the top right-hand corner.

Does anyone have any idea as to why this would be happening and any troubleshooting solutions? It’s quite confusing…

Source: Ios