Unreal Engine Issues
Unreal Engine Issues
Editor crash when drag and drop the Image widget in a NamedSlot on the designer
UE - Editor - UI Systems - Apr 20, 2020When first added as a child widget in NamedSlot, the child widget can be dragged and dropped onto the parent widget's designer. The following assert causes a crash. Assertion failed: ParentWidget ! ...
[CrashReporter] UE4Editor-D3D12RHI!CreatePipelineStateFromStream(ID3D12PipelineState * &,ID3D12Device2 *,D3D12_PIPELINE_STATE_STREAM_DESC const *,ID3D12PipelineLibrary1 *,wchar_t const *)
UE - Rendering - Architecture - RHI - Feb 15, 2019Generated from CrashReporter ...
Hardware Raytracing on Lumen can cause a crash on AMD Radeon GPUs
UE - Rendering - Graphics Features - Lumen - Jul 29, 2025Hardware Raytracing support can cause a crash on AMD Radeon GPUs when creating the RT pipeline state. ...
LevelStreamingPersistence: Crash when streaming in destroyed map actor with persisted properties
UE - World Creation - Worldbuilding Tools - Mar 6, 2026Context The LevelStreamingPersistence plugin can be used to remember and restore properties on actors and components that are part of a streamed level. Saved property values are restored when a lev ...
Crash: Opening Project Browser from Launcher with VR Mode auto-entry enabled with HMD active (worn)
UE - Editor - Workflow Systems - Apr 24, 2017If you enable VR Mode auto entry, close the project, and then attempt to launch the engine again from the Binary launcher while the HMD is active (being Worn), the Project Browser will crash ...
[CrashReport] UE4Editor-Engine!FDDSLoadHelper::IsValidCubemapTexture() [DDSLoader.cpp:158]
UE - Graphics Features - Dec 2, 2019Generated from CrashReporter ...
Attempting to set skeletal mesh on vehicle blueprint during PIE crashes editor
UE - Simulation - Physics - Feb 8, 2016Switching the skeletal mesh of an actor during PIE crashes the editor. Frequency: 5/5 Crashreporter: N/A ...
On NM_Client, GameplayDebugger defaults to green smiley for NPCs implying running BehaviorTree while AI info is unknown
UE - AI - Debugging - Mar 12, 2024Context GameplayDebugger (Press ` in-game) displays a green smiley (AICON-Green) for AIControlled pawns that are running a BehaviorTree and a red angry face (AICON-Red) otherwise. If the AIControll ...
Crash when displaying lumencards on map with many objects
UE - Rendering - Graphics Features - Lumen - Aug 1, 2025There is a thread conflict between FRDGBuilder execution in Background Worker and LumenVisualizer's LumenCard add/delete process. When lumen cards are displayed in a scene with many objects, a crash ...
Crash Occurs When One Morph Target is Deleted and Another is Adjusted Afterward
UE - Graphics Features - Feb 26, 2018Engine crashes when a morph target on an asset that has multiple morph targets is deleted and then another morph is adjusted afterwards Notes: Asset came from an older Jira where this same issue o ...