Weird glitch of UISwitch related to the UIScrollView on iOS with C# - ios

Question

I have ViewContoller, and it is view hierarchy is the following (Cirrious.FluentLayout Library, but It should be understandable):
_scrollView = new UIScrollView()
{
ShowsVerticalScrollIndicator = false
};
View.Add(_scrollView);
_contentView = new UIView();
_scrollView.Add(_contentView);
View.AddConstraints(
_scrollView.Below(VueNavBar),
_scrollView.AtLeftOf(View),
_scrollView.AtRightOf(View),
_scrollView.AtBottomOf(View)
);
_scrollView.AddConstraints(_contentView.SameFrameAs(_scrollView));
Then I add UISwitch in the following way:
var switch = new UISwitch();
_contentView.Add(switch);
After setting up constraints (I have tried many sets of constraints, many of them are definitely not ambiguous) iOS renders me the following:
It is really weird, but after toggling it changes to:
Maybe someone have any ideas why it happens?
P.S.: I have managed to broke switches on other pages by adding scroll view in the same way, however they have been broken in a differently (Other type of glitch).

Answer 1

I tried the code below and the switch displayed normally.
And there is no need for you to define the width and height of a UISwitch.
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
// Perform any additional setup after loading the view, typically from a nib.
_scrollView = new UIScrollView()
{
ShowsVerticalScrollIndicator = false,
BackgroundColor = UIColor.Blue
};
View.Add(_scrollView);
this.View.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();
View.AddConstraints(
_scrollView.AtTopOf(View,20),
_scrollView.AtLeftOf(View,20),
_scrollView.AtRightOf(View, 20),
_scrollView.AtBottomOf(View, 20)
);
_contentView = new UIView();
_contentView.BackgroundColor = UIColor.Orange;
_scrollView.Add(_contentView);
_scrollView.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();
_scrollView.AddConstraints(
_contentView.WithSameTop(_scrollView),
_contentView.WithSameLeft(_scrollView),
_contentView.WithSameWidth(_scrollView),
_contentView.WithSameHeight(_scrollView)
);
var switch1 = new UISwitch();
_contentView.Add(switch1);
_contentView.SubviewsDoNotTranslateAutoresizingMaskIntoConstraints();
_contentView.AddConstraints(
switch1.AtTopOf(_contentView, 80),
switch1.AtLeftOf(_contentView, 20)
);
}