We don't have a reproduction but it's been reported by two teams after going to 6000.3.11

     [Inline Frame] UnityPlayer.dll!D3D12ScratchBuffer::\{dtor}() Line 81    C++
     [Inline Frame] UnityPlayer.dll!delete_internal(D3D12ScratchBuffer ) Line 206    C++
     UnityPlayer.dll!D3D12ScratchAllocator::DestroyScratch(int scratchIndex) Line 115    C++
>    UnityPlayer.dll!D3D12ScratchAllocator::ReleaseExcessScratch(unsigned int frameLimit, unsigned int minimumBufferCount) Line 517    C++
     [Inline Frame] UnityPlayer.dll!D3D12ScratchAllocator::ReclaimScratchBuffers(const baselib::UnityClassic::ScopedRelease<baselib::UnityClassic::ReentrantLock> &) Line 417    C++
     UnityPlayer.dll!D3D12ScratchAllocator::ReclaimMemory(bool forceFreshScratchBuffer) Line 432    C++
     [Inline Frame] UnityPlayer.dll!GfxDeviceD3D12::ReclaimScratchMemory(bool) Line 4223    C++
     UnityPlayer.dll!GfxDeviceD3D12::QueueExecute(GfxDeviceD3D12SubmissionData & commandList, bool flush, bool returnToPool) Line 1620    C++
     UnityPlayer.dll!GfxDeviceD3D12::FlushInternal(bool forceExecute) Line 4316    C++
     UnityPlayer.dll!GfxDeviceD3D12::EndCurrentRenderSubPass() Line 6365    C++
     UnityPlayer.dll!GfxDeviceD3D12::EndRenderPassImpl() Line 6482    C++
     UnityPlayer.dll!GfxDevice::EndRenderPass() Line 1503    C++
     UnityPlayer.dll!GfxDeviceWorker::RunCommand(ThreadedStreamBuffer & stream) Line 1149    C++
     [Inline Frame] UnityPlayer.dll!ProcessGfxCommands(GfxDeviceWorker &) Line 115    C++
     UnityPlayer.dll!GfxDeviceWorker::RunExt(ThreadedStreamBuffer & stream) Line 382    C++
     [Inline Frame] UnityPlayer.dll!GfxDeviceWorker::Run() Line 360    C++
     UnityPlayer.dll!GfxDeviceWorker::RunGfxDeviceWorker(void data) Line 340    C++
     UnityPlayer.dll!Thread::RunThreadWrapper(void * ptr) Line 117    C++
     kernel32.dll!00007fffc552259d()    Unknown
     ntdll.dll!00007fffc59eafb8()    Unknown