Wrong float display in SpinCtrlDouble with wxPython

I am designing a GUI for instrumentation control using wxPython. I am first setting up all the fields and controls I need. Among those controls are SpinCtrlDouble I use to define frequencies and amplitudes with 3 digits at least. I realised that the float in SpinCtrlDouble was not displayed properly when I have SetDigits() with any number above 2. See the screenshot : floats appear selected and also shifted so you cannot see the first few numbers. Here it should display 21.62100, but the text is shifted so you cannot see the 21. How could I sort this out ? I tried to align the text in the SpinCtrlDouble with wx.TE_RIGHT but it did not change anything. I also tried to span it even more but same problem again.

Edit : I run this program on Win10, with Python3.11.5, wxPython-4.2.3. I use Visual Studio Code IDE. Problem is identical with Python3.9.21 and Python3.13.4.

import wx

class Mywin(wx.Frame): 
    def __init__(self): 
        wx.Frame.__init__(self, None, title = 'Hello')
        # main panel window
        panel = wx.Panel(self)        
        # main vbox
        vbox = wx.BoxSizer(wx.VERTICAL)
        # vbox.SetMinSize(self,(600,800))

        # StaticBoxSizer for Keithley controls
        BoxKeithleySizer = wx.StaticBoxSizer(wx.VERTICAL, panel, 'Keithley :') # StaticBox with edge and title
        BoxKeithleyGrid = wx.GridBagSizer(hgap=5, vgap=5) # add widgets to this
        toto = BoxKeithleySizer.GetStaticBox()
        toto.SetBackgroundColour((255, 201, 201)) # set background color of the StaticBox

        # widgets to go in the StaticBoxSizer for Keithley controls
        TextKeithleyFreq = wx.StaticText(BoxKeithleySizer.GetStaticBox(), -1, "Freq.")
        BoxKeithleyFreq = wx.SpinCtrlDouble(BoxKeithleySizer.GetStaticBox(), -1)
        UnitKeithleyFreq = wx.StaticText(BoxKeithleySizer.GetStaticBox(), -1, "MHz")

        BoxKeithleyFreq.SetDigits(5)
        BoxKeithleyFreq.SetIncrement(0.001)
        BoxKeithleyFreq.SetMin(21.600)
        BoxKeithleyFreq.SetMax(21.650)
        BoxKeithleyFreq.SetValue(21.621)

        # add widgets to the StaticBoxSizer for Keithley controls
        BoxKeithleyGrid.Add(TextKeithleyFreq, pos=(0,0), flag = wx.ALIGN_RIGHT | wx.ALIGN_CENTER_VERTICAL)
        BoxKeithleyGrid.Add(BoxKeithleyFreq, pos=(0,1), span=(1,5), flag = wx.EXPAND | wx.ALIGN_CENTER_VERTICAL)
        BoxKeithleyGrid.Add(UnitKeithleyFreq, pos=(0,6), flag = wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL)

        BoxKeithleySizer.Add(BoxKeithleyGrid)
        # add Sizers to main vbox and panel
        vbox.Add(BoxKeithleySizer,0, wx.ALL|wx.LEFT, 5)
        panel.SetSizer(vbox)

class MyApp(wx.App):
    def OnInit(self):

        frame = Mywin()
        frame.Show()
        self.SetTopWindow(frame)

        return True

def main():
    app = MyApp(redirect=False)
    app.MainLoop()

if __name__ == "__main__" :
    main()