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I have a UICollectionView which should support setting collectionViewLayout to different types of layouts (two right now). When I first change the layout, there's no issue. The issue is when I want to reset it back after that layout change. It crashes on collectionView.setCollectionViewLayout(firstLayout, animated: false) whether or not I call collectionView.collectionViewLayout.invalidateLayout() before. Sometimes I get a EXC_BAD_ACCESS and other times I get signal SIGABRT and a console message:Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[_UIFlowLayoutSection center]: unrecognized selector sent to class 0x10f86b408'It doesn't seem to be firstLayout's fault. Also, the crash doesn't happen on every test but usually does.Here's the function where I update the layout based on currentChoice:let firstLayout = UICollectionViewFlowLayout() let secondLayout = UICollectionViewFlowLayout() func updateCollectionView() { switch currentChoice { case .vegetables, .toppings, .dressings: collectionView.alwaysBounceHorizontal = false collectionView.alwaysBounceVertical = true collectionView.isPagingEnabled = false collectionView.collectionViewLayout.invalidateLayout() collectionView.setCollectionViewLayout(firstLayout, animated: false) default: collectionView.alwaysBounceHorizontal = true collectionView.alwaysBounceVertical = false collectionView.isPagingEnabled = true collectionView.collectionViewLayout.invalidateLayout() collectionView.setCollectionViewLayout(secondLayout, animated: false) } }The code is pretty simple. It really seems like there's just a bug with UICollectionView or something.