View with multiple layers dont relese memory - ios

Question

I create custom View:
final class Clock: UIView {
lazy var hourArrow: CALayer = {
let layer = CALayer()
layer.contents = #imageLiteral(resourceName: "hourArrow").cgImage
layer.contentsGravity = kCAGravityResizeAspect
return layer
}()
lazy var subLayers = [hourArrow,minuteArrow,centerDial,clockDial,clockArrow,block]
override init(frame: CGRect) {
super.init(frame: frame)
subLayers.forEach { (l) in
layer.addSublayer(l)
}
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layoutSubviews() {
subLayers.forEach({ l in
let rect = CGRect(x: 0, y: 0, width: frame.width, height: frame.height)
l.frame = rect
})
}
}
and i use it ViewController:
class ClockViewController: UIViewController {
lazy var clock: Clock = {
let clock = Clock(frame: .zero)
clock.translatesAutoresizingMaskIntoConstraints = false
return clock
}()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(clock)
let safeArea = view.safeAreaLayoutGuide
clock.topAnchor.constraint(equalTo: safeArea.topAnchor, constant: 40).isActive = true
clock.leadingAnchor.constraint(equalTo: safeArea.leadingAnchor, constant: 40).isActive = true
clock.trailingAnchor.constraint(equalTo: safeArea.trailingAnchor, constant: -40).isActive = true
clock.heightAnchor.constraint(equalToConstant: 100).isActive = true
// Do any additional setup after loading the view.
}
}
then i move to this view controller, memory up to 10 MB with this layers.
When i dismiss VC, memory don't release but deinit was called.
(I must remove CALayer variables to post this, all of layers are create like first)
Any Ideas?