Picker rows disappear when scrolling

[svastven]

When I try to scroll through my picker which is positioned under the title all the rows disappear. I have searched for this issue and I have found (not here) that the issue is connected with the view that contains the picker.

Are there any solutions?

my code:

import BLTNBoard

class PickerBLTNItem<T: Pickable>: BLTNPageItem, UIPickerViewDataSource, UIPickerViewDelegate {
    lazy var picker: UIPickerView = UIPickerView()
    var items: [T]
    
    init(items: [T]) {
        self.items = items
        super.init(title: T.description)
        setup()
    }
    
    func setup() {
        image = T.image
        actionButtonTitle = Localized.General.done
        picker.delegate = self
        picker.dataSource = self
    }
    
    override func makeViewsUnderImage(with interfaceBuilder: BLTNInterfaceBuilder) -> [UIView]? {
        return [picker]
    }
    
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return items[row].description
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return items.count
    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
}

first I have tried implementing a picker with custom rows and I thought that the customization might cause this problem but even the simplest picker implementation doesn't work and causes the same issue.

[omarmhaimdat]

same problem

[omarmhaimdat]

My problem came from dark mode in iOS 13

[svastven]

I am implementing an app supporting iOS 11 and higher and have not tried dark mode