Crash running Cloth functional tests

Crash occurs when running the Cloth functional test map.

1. Open EngineTest in editor.
2. Open the Cloth level.
3. Click on Window > Automation Tool.
4. Click Run Level Tests

RESULT

Crash

Fatal error: [Link Removed] [Line: 804]
Rendering thread exception:
Assertion failed: ClothSimulPositionNormalBuffer[Index].VertexBufferRHI.IsValid() [Link Removed] [Line: 695]

KERNELBASE.dll!0x00000000FD65A06D
UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() [d:\animphys\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:120]
UE4Editor-Core.dll!FOutputDevice::Logf__VA() [d:\animphys\engine\source\runtime\core\private\misc\outputdevice.cpp:70]
UE4Editor-Core.dll!FDebug::AssertFailed() [d:\animphys\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
UE4Editor-Engine.dll!TGPUSkinAPEXClothVertexFactoryShaderParameters::SetMesh() [d:\animphys\engine\source\runtime\engine\private\gpuskinvertexfactory.cpp:806]
UE4Editor-Renderer.dll!FMeshMaterialShader::SetMesh<FRHIVertexShader * __ptr64>() [d:\animphys\engine\source\runtime\renderer\private\shaderbaseclasses.cpp:455]
UE4Editor-Renderer.dll!FDepthDrawingPolicy::SetMeshRenderState() [d:\animphys\engine\source\runtime\renderer\private\depthrendering.cpp:452]
UE4Editor-Renderer.dll!FDepthDrawingPolicyFactory::DrawMesh() [d:\animphys\engine\source\runtime\renderer\private\depthrendering.cpp:760]
UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::RenderPrePassViewDynamic() [d:\animphys\engine\source\runtime\renderer\private\depthrendering.cpp:848]
UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::RenderPrePassView() [d:\animphys\engine\source\runtime\renderer\private\depthrendering.cpp:979]
UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::RenderPrePass() [d:\animphys\engine\source\runtime\renderer\private\depthrendering.cpp:1287]
UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::Render() [d:\animphys\engine\source\runtime\renderer\private\deferredshadingrenderer.cpp:749]
UE4Editor-Renderer.dll!RenderViewFamily_RenderThread() [d:\animphys\engine\source\runtime\renderer\private\scenerendering.cpp:1821]
UE4Editor-Renderer.dll!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`26'::EURCMacro_FDrawSceneCommand>::ExecuteTask() [d:\animphys\engine\source\runtime\core\public\async\taskgraphinterfaces.h:883]
UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread() [d:\animphys\engine\source\runtime\core\private\async\taskgraph.cpp:954]
UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit() [d:\animphys\engine\source\runtime\core\private\async\taskgraph.cpp:701]
UE4Editor-RenderCore.dll!RenderingThreadMain() [d:\animphys\engine\source\runtime\rendercore\private\renderingthread.cpp:327]
UE4Editor-RenderCore.dll!FRenderingThread::Run() [d:\animphys\engine\source\runtime\rendercore\private\renderingthread.cpp:461]
UE4Editor-Core.dll!FRunnableThreadWin::Run() [d:\animphys\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]
UE4Editor-Core.dll!FRunnableThreadWin::GuardedRun() [d:\animphys\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:33]
kernel32.dll!0x00000000775159CD
ntdll.dll!0x000000007764A561
ntdll.dll!0x000000007764A561

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