BLANK WHITE MIDDLE COLUMN for newer iphone models, please let me know if there is a fix for this

[ferb120]

[FlashTang]

I don't know the bug , since I don't have the new device
But I tried to custom the cell
I think you can try add "sizeForItemAt" to UICollectionViewDelegateFlowLayout
The tricky part is "-1"

public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let wid = (view.bounds.size.width - (padding * 2) - 1 - spaceX * CGFloat(cellPerLine - 1)) / CGFloat(cellPerLine)
        return CGSize(width: wid, height: wid)
    }

Hope it helps