Custom panel crashes during hot reload

[bizehao]

Describe the bug

winui3 cpp

I customized a panel. When I run it, I modify the properties of my panel. It is normal and as expected, but when I delete an attribute, it crashes.

This is my layout and my custom panel(yoga:FlexLayout)，When I modify the value of Wrap it is normal，But when I remove this Wrap, it crashes

Layout after deletion：

 	0000000000000000()	unknow
 	LeveldbManager.exe!winrt::LeveldbManager::implementation::XamlUserType::ActivateInstance() Line 452	C++
 	LeveldbManager.exe!winrt::impl::produce<winrt::LeveldbManager::implementation::XamlUserType,winrt::Microsoft::UI::Xaml::Markup::IXamlType>::ActivateInstance(void * * result) Line 1004	C++
 	[external code]	
>	LeveldbManager.exe!winrt::impl::consume_Microsoft_UI_Xaml_IApplicationStatics<winrt::Microsoft::UI::Xaml::IApplicationStatics>::Start(const winrt::Microsoft::UI::Xaml::ApplicationInitializationCallback & callback) Line 174	C++
 	LeveldbManager.exe!winrt::Microsoft::UI::Xaml::Application::Start::__l2::<lambda_1>::operator()(const winrt::Microsoft::UI::Xaml::IApplicationStatics & f) Line 12357	C++
 	LeveldbManager.exe!winrt::impl::factory_cache_entry<winrt::Microsoft::UI::Xaml::Application,winrt::Microsoft::UI::Xaml::IApplicationStatics>::call<`winrt::Microsoft::UI::Xaml::Application::Start'::`2'::<lambda_1> &>(winrt::Microsoft::UI::Xaml::Application::Start::__l2::<lambda_1> & callback) Line 6476	C++
 	LeveldbManager.exe!winrt::impl::call_factory<winrt::Microsoft::UI::Xaml::Application,winrt::Microsoft::UI::Xaml::IApplicationStatics,`winrt::Microsoft::UI::Xaml::Application::Start'::`2'::<lambda_1>>(winrt::Microsoft::UI::Xaml::Application::Start::__l2::<lambda_1> && callback) Line 6499	C++
 	LeveldbManager.exe!winrt::Microsoft::UI::Xaml::Application::Start(const winrt::Microsoft::UI::Xaml::ApplicationInitializationCallback & callback) Line 12358	C++
 	[external code]	
	

This all happens in hot reload when xaml is modified

Steps to reproduce the bug

Customize the panel, and then delete some of the added attributes after starting it.

Expected behavior

No response

Screenshots

No response

NuGet package version

None

Windows version

No response

Additional context

No response

[JesseCol]

Hi, I'm trying to repro this, but I'm not seeing a crash. Can you please include a minimal repro project? Thanks!

[bizehao]

ok, I will upload a demo

[bizehao]

ok, I will upload a demo

[bizehao]

Uploading FlexLayoutPlay.zip…