Animates only first line after .addLine() invoked

[yablodev]

Hello!
When I first time invoke addLine function it works great (line appears with animation), but when I try add second line by invoking the same addLine function, first line appears with animation but second line and other appear without animation.
`@IBAction func addLine(_ sender: UIButton) {

    let data2: [CGFloat] = [1, 3, 5, 13, 17, 20]
    lineChart.colors.append(UIColor.cyan)
    lineChart.addLine(data2) // add second line
    
}
override func viewDidLoad() {
    super.viewDidLoad()
    
    
    label.text = "..."
    label.translatesAutoresizingMaskIntoConstraints = false
    label.textAlignment = NSTextAlignment.center
    self.view.addSubview(label)
    
    // simple arrays
    let data: [CGFloat] = [3, 4, 2, 11, 13, 15]
    
    
    // simple line with custom x axis labels
    let xLabels: [String] = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
    
    //lineChart = LineChart()
    lineChart.animation.enabled = true
    lineChart.area = true
    lineChart.x.labels.visible = true
    lineChart.x.grid.count = 10
    lineChart.y.grid.count = 10
    lineChart.x.labels.values = xLabels
    lineChart.y.labels.visible = true
    lineChart.addLine(data) //add first line
    
    lineChart.dots.outerRadius = 6
    lineChart.dots.innerRadius = 4
    
    lineChart.colors = [UIColor.black]
    
    lineChart.translatesAutoresizingMaskIntoConstraints = false
    lineChart.delegate = self
    // Do any additional setup after loading the view, typically from a nib.
}`