C++/WinRT - unpackaged - Customized title bar controls not clickable & SetDragRectangle displays default titlebar

[yki5000]

Describe the bug

Controls of customized titlebar are not clickable and only by setting "SetDragRectangle" the default titlebar appears and covers the customized titlebar.

As described in the following post, the issue should be fixed in Windows App SDK 1.2 Preview 1 (at least in C#, in C++ it doesn't work): microsoft/WindowsAppSDK#2574

I had 1.1.5 installed before.

Steps to reproduce the bug

Create an unpackaged WinUI 3 app.
Add the customized titlebar with controls and set "SetDragRectangle".

Kindly already scrutinized by @DarranRowe & @castorix & @bpulliam. Please see the results: microsoft/WindowsAppSDK#3243

See my example (code in MainWindow.xaml.cpp):
https://github.com/yki5000/WinUI3_Unpackaged_CPP

See 2 example videos which show you the errors:
yki5000/WinUI3_Unpackaged_CPP#1

Expected behavior

Added titlebar controls should be usable by user input and SetDragRectangle shouldn't let the default titlebar appear.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.2.2: 1.2.221209.1

Windows version

Windows 11 (22H2): Build 22621

Additional context

It's an unpackaged C++ app.
Also tested in Windows 10 on an other laptop.

[github-actions]

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[yki5000]

Closed? Stupid bot.