Wizard 'Back' button does not return to previous step

[gusmanb]

Describe the bug
Wizard 'Back' button does not return to previous step.

To Reproduce
This simple case illustrates the problem:

using Terminal.Gui;
using TerminalCapture;

Application.Init();
Wizard wizard = new Wizard();
wizard.AddStep(new WizardStep());
wizard.AddStep(new WizardStep());
Application.Run(wizard);

When in the second step press the back button, it stays in the same step.

Debugging the code it seems the back button in fact goes back but it instantly goes to the next step, adding a handler to the MovingNext event makes it obvious as it triggers immediatelly and if you cancel the event it stays properly in the correct step.

Expected behavior
Wizard moves back to the previous step and stays in it.

Desktop (please complete the following information):

• OS: Windows 11
• Version v2_develop

[gusmanb]

A simple workaround that demonstrates that the problem is that 'GoNext()' is called right after 'GoBack()'.

using Terminal.Gui;
using TerminalCapture;

Application.Init();
Wizard wizard = new CanGoBackWizard();
wizard.AddStep(new WizardStep());
wizard.AddStep(new WizardStep());
Application.Run(wizard);

class CanGoBackWizard : Wizard
{

    private bool _back;

    public CanGoBackWizard()
    {
        MovingNext += CanGoBackWizard_MovingNext;
        MovingBack += CanGoBackWizard_MovingBack;
    }

    private void CanGoBackWizard_MovingBack(object? sender, WizardButtonEventArgs e)
    {
        _back = true;
    }

    private void CanGoBackWizard_MovingNext(object? sender, WizardButtonEventArgs e)
    {
        if (_back)
        {
            _back = false;
            e.Cancel = true;
        }
    }
}