Unstable automation tests in "Standard Tests" list.

The two following automation tests found in the "Standard Tests" list hit exceptions & cause the editor to crash:

• System->Physics->Interface->BodyInstance

• Shaders->ShaderPreprocessor->BuiltInMacros

• Create & open a blank, c++ project.

• Open Session Frontend (Either standalone or in editor).

• Run all tests in the "Standard Tests" section.

Alternatively run the following tests, one at a time:

System->Physics->Interface->BodyInstance

Shaders->ShaderPreprocessor->BuiltinMacros

• Observe the engine hitting an exception and crashing.

{{ UnrealEditor-Win64-Debug.exe!FRHIBreadcrumbEventManual::~FRHIBreadcrumbEventManual() Line 272 C++}}
{{ UnrealEditor-Win64-Debug.exe!TOptional<FRHIBreadcrumbEventManual>::~TOptional<FRHIBreadcrumbEventManual>() Line 230 C++}}
{{ UnrealEditor-Win64-Debug.exe!`dynamic atexit destructor for 'GRHIFrameBreadcrumb''() C++}}
{{ ucrtbase.dll!00007ffbea18bc75() Unknown}}
{{ ucrtbase.dll!00007ffbea18b897() Unknown}}
{{ ucrtbase.dll!00007ffbea18b84d() Unknown}}
{{ ucrtbase.dll!00007ffbea18af49() Unknown}}
{{ ucrtbase.dll!00007ffbea18aedb() Unknown}}
{{ ucrtbase.dll!00007ffbea1e003a() Unknown}}
{{ UnrealEditor-ShaderPreprocessor-Win64-Debug.dll!init_directive(char * s, int hash) Line 5181 C}}
{{ UnrealEditor-ShaderPreprocessor-Win64-Debug.dll!init_preprocessor(const char ()(const char *, void *, unsigned int64 ) load_callback, void()(const char *, const char *, void *) free_callback, const char ()(const char *, unsigned int, const char *, void *) resolve_callback, const char ()(const char *, void ) custommacro_begin_callback, void()(const char *, void *, const char *) custommacro_end_callback) Line 5242 C}}
{{ UnrealEditor-ShaderPreprocessor-Win64-Debug.dll!ExecutePreprocessTest(const TStringView<char> & Source) Line 97 C++}}
{{ UnrealEditor-ShaderPreprocessor-Win64-Debug.dll!FSpecialMacros::TestBody(const FString & Parameters) Line 169 C++}}
{{ UnrealEditor-ShaderPreprocessor-Win64-Debug.dll!FSpecialMacros::RunTest(const FString & Parameters) Line 162 C++}}
{{ UnrealEditor-Core-Win64-Debug.dll!FAutomationTestFramework::InternalStartTest(const FString & InTestToRun, const FString & InFullTestPath) Line 1316 C++}}
{{ UnrealEditor-Core-Win64-Debug.dll!FAutomationTestFramework::StartTestByName(const FString & InTestToRun, const int InRoleIndex, const FString & InFullTestPath) Line 653 C++}}
{{ UnrealEditor-AutomationWorker-Win64-Debug.dll!FAutomationWorkerModule::HandleRunTestsMessage(const FAutomationWorkerRunTests & Message, const TSharedRef<IMessageContext,1> & Context) Line 699 C++}}
{{ UnrealEditor-AutomationWorker-Win64-Debug.dll!TRawMessageHandler<FAutomationWorkerRunTests,FAutomationWorkerModule>::HandleMessage(const TSharedRef<IMessageContext,1> & Context) Line 103 C++}}
{{ UnrealEditor-AutomationWorker-Win64-Debug.dll!FMessageEndpoint::ProcessMessage(const TSharedRef<IMessageContext,1> & Context) Line 1022 C++}}
{{ UnrealEditor-AutomationWorker-Win64-Debug.dll!FMessageEndpoint::ProcessInbox() Line 449 C++}}
{{ UnrealEditor-AutomationWorker-Win64-Debug.dll!FAutomationWorkerModule::Tick() Line 98 C++}}
{{ UnrealEditor-Win64-Debug.exe!FEngineLoop::Tick() Line 6024 C++}}
{{ UnrealEditor-Win64-Debug.exe!EngineTick() Line 60 C++}}
{{ UnrealEditor-Win64-Debug.exe!GuardedMain(const wchar_t * CmdLine) Line 192 C++}}
{{ UnrealEditor-Win64-Debug.exe!LaunchWindowsStartup(HINSTANCE * hInInstance, HINSTANCE__ * hPrevInstance, char * formal, int nCmdShow, const wchar_t * CmdLine) Line 266 C++}}
{{ UnrealEditor-Win64-Debug.exe!WinMain(HINSTANCE * hInInstance, HINSTANCE__ * hPrevInstance, char * pCmdLine, int nCmdShow) Line 336 C++}}