Assertion failed in DX12 RHI after instancing actors

It doesn't happen with the DX11 RHI

• open project [Link Removed]
• make sure to use -dx12
• press play
• in the UMG edit box in the upper corner, enter 12
• this will instantiate 12 models
  -> assert after a couple of frames

Assertion failed: ActiveAllocatedElementCount <= GetQueryHeapCount() [Link Removed] [Line: 349]

UE4Editor_Core!FDebug::CheckVerifyFailedImpl() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\core\private\misc\assertionmacros.cpp:418]
UE4Editor_D3D12RHI!FD3D12QueryHeap::EndQueryBatchAndResolveQueryData() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\d3d12rhi\private\d3d12query.cpp:349]
UE4Editor_D3D12RHI!FD3D12CommandContext::RHIEndRenderPass() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\d3d12rhi\private\d3d12commandcontext.h:338]
UE4Editor_RHI!FRHICommandListExecutor::ExecuteInner_DoExecute() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\rhi\private\rhicommandlist.cpp:325]
UE4Editor_RHI!FExecuteRHIThreadTask::DoTask() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\rhi\private\rhicommandlist.cpp:384]
UE4Editor_RHI!TGraphTask<FExecuteRHIThreadTask>::ExecuteTask() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\core\public\async\taskgraphinterfaces.h:842]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\core\private\async\taskgraph.cpp:686]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\core\private\async\taskgraph.cpp:582]
UE4Editor_RenderCore!FRHIThread::Run() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\rendercore\private\renderingthread.cpp:282]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\thomas.convard_rdu-wd-10724-release-4.22\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:96]