visibleCells is empty in iOS 12

[Yewenyu]

visibleCells is empty in iOS 12
I guess you didn't override visibleCells to cause this situation.
When used IBPCollectionViewCompositionalLayout in iOS12, it will create some IBUICollectionView as section to my collectionView, by this time the cell is not belong to my collectionView, but belong to IBUICollectionView.

[Daltron]

Experiencing the exact same issue as well!

[geraldeersteling]

Is this also causing the crash on i.e. viewWillTransition?