Blinking parallax on iPhone 8 plus

[Streetmage]

There is a problem scrolling 1-st and 2-nd pages. Pages are blinking during slow scrolling. For pages number higher than 3 it works fine. Reproduced on iPhone 8 plus so far for example app.

https://monosnap.com/file/nZNyO1yi7bhA7p9peXotsrxKNqKexJ

[Streetmage]

Seems like replacing

if direction == .horizontal {
            let width = collectionView.frame.width
            let transitionX = -(width * speed * position)
            let transform = CGAffineTransform(translationX: transitionX, y: 0)
            let newFrame = attributes.bounds.applying(transform)
            
            contentView.frame = newFrame
        }

with

if direction == .horizontal {
            let width = collectionView.frame.width
            let transitionX = -(width * speed * position)
            var newFrame = attributes.bounds
            newFrame.origin.x = transitionX
            contentView.frame = newFrame
        }

solves the problem

[KelvinJin]

Wow, nice finding. Ideally the applying method should work exactly the same as setting the origin ourselves. Feels like a UIKit bug or something.