UICollectionView showing scroll indicator for every section (header zIndex broken)

Question

When scrolling through my UICollectionView it's showing more than one scroll indicator. I've noticed there is a one for every section in the collection. See screenshot displaying three at the same time:

Anyone experienced same issue? I am using Xcode 9 beta 3. My collectionview setup is quite common:

private let formCollectionView: UICollectionView = {
        let collectionViewLayout = UICollectionViewFlowLayout()
        collectionViewLayout.minimumLineSpacing = 0
        collectionViewLayout.minimumInteritemSpacing = 0
        let collectionView = UICollectionView(frame: .zero, collectionViewLayout: collectionViewLayout)
        collectionView.translatesAutoresizingMaskIntoConstraints = false
        collectionView.backgroundColor = UIColor.clear
        return collectionView
}()

Edit 10/16/2017

Even Twitter seems having this issue:

Answer 1

you can fix this problem in delegate method.as in the following example

Objective-C

- (void)collectionView:(UICollectionView *)collectionView willDisplaySupplementaryView:(UICollectionReusableView *)view forElementKind:(NSString *)elementKind atIndexPath:(NSIndexPath *)indexPath
    {
        if (@available(iOS 11.0, *)) {
            if ([elementKind isEqualToString:UICollectionElementKindSectionHeader]) {
                view.layer.zPosition = 0;
            }
        }
    }

Swift

func collectionView(_ collectionView: UICollectionView, willDisplaySupplementaryView view: UICollectionReusableView, forElementKind elementKind: String, at indexPath: IndexPath) {
    if elementKind == UICollectionView.elementKindSectionHeader {
        view.layer.zPosition = 0
    }
}

Answer 2

Ok, so first of all there is a radar already.

There is a proposed workaround. I was partially successful with doing this crap inside my UICollectionReusableView subclass.

override func apply(_ layoutAttributes: UICollectionViewLayoutAttributes) {
    super.apply(layoutAttributes)
    DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.01) {
        self.layer.zPosition = 0
    }
}

I am saying partially because if you have a little bit longer UICollectionView it's still corrupted for some headers. Most of them are ok though. So it depends on your situation. Hopefully that radar will be addressed soon.