Crashes when using UMotion with VFX Graph assets

Hi there,

I encountered multiple crashes while working with UMotion and I suspect it might be related to how it interacts with VFX Graph assets.

I’m using this package for a sword effect

https://assetstore.unity.com/packages/vfx/particles/vfx-graph-weapon-effects-vol-1-206237

The sword GameObject (which contains a VFX Graph) is initially disabled in the hierarchy.

The crashes seem to occur more frequently when both the Pose Editor and the Clip Editor windows are open in UMotion. I noticed that once I removed the VFX asset from the hierarchy, the crashes stopped occurring.

This makes me think there may be some kind of conflict between UMotion’s editor updates and Unity’s VFX system.

Here is one of the stack traces from a crash:

========== OUTPUTTING STACK TRACE ==================

0x00007FFE31E215BC (Unity) MemoryProfilerStats::UnregisterObject

0x00007FFE31E21886 (Unity) profiler_unregister_object

0x00007FFE31A0C5F8 (Unity) delete_object_internal_step1

0x00007FFE31A08EF9 (Unity) DestroySingleObject

0x00007FFE32BBA4E0 (Unity) VFXParticleSystemBatchData::~VFXParticleSystemBatchData

0x00007FFE32BBAD74 (Unity) VFXParticleSystemBatchData::`vector deleting destructor'

0x00007FFE32BD2A42 (Unity) VFXBatch::~VFXBatch

0x00007FFE32BD4818 (Unity) VFXBatchPool::Destruct

0x00007FFE32BCC84A (Unity) VFXBatchedEffect::CleanupEmptyBatches

0x00007FFE32BF02CB (Unity) VFXManager::Update

0x00007FFE32BE6A31 (Unity) `VFXManager::InitializeClass'::`2'::PostLateUpdateVFXUpdateRegistrator::Forward

0x00007FFE31DBBB37 (Unity) ExecutePlayerLoop

0x00007FFE31DBBCA7 (Unity) ExecutePlayerLoop

0x00007FFE31DC0D9F (Unity) PlayerLoop

0x00007FFE32EBBB1A (Unity) EditorPlayerLoop::Execute

0x00007FFE32ED29BA (Unity) PlayerLoopController::InternalUpdateScene

0x00007FFE32ED479D (Unity) PlayerLoopController::UpdateSceneIfNeededFromMainLoop

0x00007FFE32ECE45C (Unity) Application::TickTimer

0x00007FFE334C6A26 (Unity) WindowsDropTargetImpl::DragUpdated

0x00007FFE334B6E80 (Unity) CDropTarget::DragOver

0x00007FFEECBAC006 (ole32) RevokeActiveObjectExt

0x00007FFEECBABE6C (ole32) RevokeActiveObjectExt

0x00007FFEECB6A01A (ole32) OleGetPackageClipboardOwner

0x00007FFEECB69F51 (ole32) OleGetPackageClipboardOwner

0x00007FFEECB6DAA0 (ole32) DoDragDrop

0x00007FFE334CAE27 (Unity) DragAndDrop::StartDelayedDrag

0x00007FFE334C6F4A (Unity) DragAndDrop::ApplyQueuedStartDrag

0x00007FFE334E63F1 (Unity) GUIView::OnInputEvent

0x00007FFE3345A18D (Unity) GUIView::ProcessInputEvent

0x00007FFE334E6E71 (Unity) GUIViewPlatform::ProcessEventMessages

0x00007FFE334E33CF (Unity) GUIViewPlatform::GUIViewWndProc

0x00007FFEED83EF5C (USER32) CallWindowProcW

0x00007FFEED83E684 (USER32) DispatchMessageW

0x00007FFE334A98C3 (Unity) MainMessageLoop

0x00007FFE334AF59C (Unity) UnityMain

0x00007FF701E92FBA (Unity) __scrt_common_main_seh

0x00007FFEED407374 (KERNEL32) BaseThreadInitThunk

0x00007FFEEE0BCC91 (ntdll) RtlUserThreadStart