ToolbarItem icon in iOS

I have a strange behaviour working with toolbar icons on iOS. Here is the code:

ToolbarItems.Add(new ToolbarItem("Info", "info-icon.png", () =>
{
  Navigation.PushAsync(new AboutPage());
}));

In iOS project resources I have info-icon@2x.png sized 44x44.

When the screen is shown I see the icon, but it's heavily blurred. Why?