Vertical grid lines not correct drawn, when x axis is at the top about scottplot HOT 5 CLOSED

using ScottPlot;

namespace Sandbox.WinForms;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        var sig = formsPlot1.Plot.Add.Signal(Generate.Sin());
        sig.Axes.XAxis = formsPlot1.Plot.Axes.Top;
    }
}

using ScottPlot;

namespace Sandbox.WinForms;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        var sig = formsPlot1.Plot.Add.Signal(Generate.Sin());
        sig.Axes.XAxis = formsPlot1.Plot.Axes.Top;

        // keep the default grid but change the axis it uses
        formsPlot1.Plot.Axes.DefaultGrid.XAxis = formsPlot1.Plot.Axes.Top;
    }
}