Crash when enabling Forward Shading and restarting editor

[2019.09.04-18.43.01:225][ 0]LogMac: === Critical error: ===
SIGABRT: abort() called

[2019.09.04-18.43.01:225][ 0]LogMac: 0x64bd044e libsystem_kernel.dylib!__pthread_kill() [UnknownFile])
0x64b58a38 libsystem_c.dylib!abort() [UnknownFile])
0x64b57cf2 libsystem_c.dylib!err() [UnknownFile])
0x2e4b42b4 UE4Editor-MetalRHI.dylib!mtlpp::Texture::GetPixelFormat() const [UnknownFile])
0x2e59c7cd UE4Editor-MetalRHI.dylib!FMetalStateCache::SetRenderPipelineState(FMetalCommandEncoder&, FMetalCommandEncoder*) [UnknownFile])
0x2e5875b3 UE4Editor-MetalRHI.dylib!FMetalRenderPass::PrepareToRender(unsigned int) [UnknownFile])
0x2e58d416 UE4Editor-MetalRHI.dylib!FMetalRenderPass::DrawIndexedPrimitive(FMetalBuffer const&, unsigned int, unsigned int, int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) [UnknownFile])
0x2e50f378 UE4Editor-MetalRHI.dylib!FMetalRHICommandContext::RHIDrawIndexedPrimitive(FRHIIndexBuffer*, int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) [UnknownFile])
0x14ae582c UE4Editor-Renderer.dylib!FMeshDrawCommand::SubmitDraw(FMeshDrawCommand const&, TSet<FGraphicsMinimalPipelineStateInitializer, DefaultKeyFuncs<FGraphicsMinimalPipelineStateInitializer, false>, FDefaultSetAllocator> const&, FRHIVertexBuffer*, int, unsigned int, FRHICommandList&, FMeshDrawCommandStateCache&) [UnknownFile])
0x14ae64fc UE4Editor-Renderer.dylib!SubmitMeshDrawCommandsRange(TArray<FVisibleMeshDrawCommand, TMemStackAllocator<0u> > const&, TSet<FGraphicsMinimalPipelineStateInitializer, DefaultKeyFuncs<FGraphicsMinimalPipelineStateInitializer, false>, FDefaultSetAllocator> const&, FRHIVertexBuffer*, int, bool, int, int, unsigned int, FRHICommandList&) [UnknownFile])
0x14a8100d UE4Editor-Renderer.dylib!FParallelMeshDrawCommandPass::DispatchDraw(FParallelCommandListSet*, FRHICommandList&) const [UnknownFile])
0x1490e866 UE4Editor-Renderer.dylib!FDeferredShadingSceneRenderer::RenderBasePassView(FRHICommandListImmediate&, FViewInfo&, FExclusiveDepthStencil::Type, FMeshPassProcessorRenderState const&) [UnknownFile])
0x1490d8e9 UE4Editor-Renderer.dylib!FDeferredShadingSceneRenderer::RenderBasePass(FRHICommandListImmediate&, FExclusiveDepthStencil::Type, IPooledRenderTarget*, bool, bool) [UnknownFile])
0x149b1f49 UE4Editor-Renderer.dylib!FDeferredShadingSceneRenderer::Render(FRHICommandListImmediate&) [UnknownFile])
0x14decfc9 UE4Editor-Renderer.dylib!RenderViewFamily_RenderThread(FRHICommandListImmediate&, FSceneRenderer*) [UnknownFile])
0x14def088 UE4Editor-Renderer.dylib!TGraphTask<TEnqueueUniqueRenderCommandType<FRendererModule::BeginRenderingViewFamily(FCanvas*, FSceneViewFamily*)::FDrawSceneCommandName, FRendererModule::BeginRenderingViewFamily(FCanvas*, FSceneViewFamily*)::$_95> >::ExecuteTask(TArray<FBaseGraphTask*, TSizedDefaultAllocator<32> >&, ENamedThreads::Type) [UnknownFile])
0x02761c3c UE4Editor-Core.dylib!FNamedTaskThread::ProcessTasksNamedThread(int, bool) [UnknownFile])
0x02760a53 UE4Editor-Core.dylib!FNamedTaskThread::ProcessTasksUntilQuit(int) [UnknownFile])
0x09a79373 UE4Editor-RenderCore.dylib!RenderingThreadMain(FEvent*) [UnknownFile])
0x09ae0387 UE4Editor-RenderCore.dylib!FRenderingThread::Run() [UnknownFile])
0x02816628 UE4Editor-Core.dylib!FRunnableThreadPThread::Run() [UnknownFile])
0x027db1c1 UE4Editor-Core.dylib!FRunnableThreadPThread::_ThreadProc(void*) [UnknownFile])
0x64c8dd76 libsystem_pthread.dylib!_pthread_start() [UnknownFile])
0x64c8a5e3 libsystem_pthread.dylib!thread_start() [UnknownFile])