Calling Page Save() without modification results in ClientException

[SPWizard01]

Category

• Bug

Describe the bug

When I call Save() method without any modification I get an error

   at PnP.Core.Model.SharePoint.PageWebPart.ToHtml(Single controlIndex)
   at PnP.Core.Model.SharePoint.CanvasColumn.ToHtml()
   at PnP.Core.Model.SharePoint.CanvasSection.ToHtml()
   at PnP.Core.Model.SharePoint.Page.ToHtml()
   at PnP.Core.Model.SharePoint.Page.<SaveAsync>d__151.MoveNext()
   at PnP.Core.Model.SharePoint.Page.Save(String pageName)
   at Program.<<Main>$>d__0.MoveNext() in C:\P\PnPCoreTests\Program.cs:line 167

Steps to reproduce

    var pnpContextFactory = scope.ServiceProvider.GetRequiredService<IPnPContextFactory>();
    var context = await pnpContextFactory.CreateAsync(new Uri(siteUrl));
    var pg = context.Web.GetPages("Page With FullWidth Sections.aspx");
    var f = pg.First();
    f.Save();
    f.Publish();

Expected behavior

The page saves without error.

Environment details (development & target environment)

• SDK version: 1.14.0
• OS: Windows 11
• SDK used in: Console App
• Framework: .NET Core v9
• Browser(s): Latest Chromium Edge
• Tooling: Visual Studio 2022 Preview

Additional context

What I am trying to achieve is removing header from Communication Site page, works in UI but does not work in the code.