Unreal Engine Issues
Unreal Engine Issues
Crash when copying and making a button widget the root of a second widget blueprint
UE - Editor - UI Systems - Apr 13, 2021Pasting a button element from one Widget Blueprint into a second Widget Blueprint that has had its root Canvas Panel deleted results in a crash. The crash only occurs when the Canvas Panel is delete ...
Crash loading sublevel that had name changed when it is unloaded.
Tools - Apr 2, 2019Updated name of sublevel leads to crash when it is about to be loaded. ...
Editing values in ReverbMasterSubmixEffect causes crash
UE - Audio - Nov 7, 2019Adding and removing Submixes at runtime, then editing the preset causes the editor to crash. Tested in 4.22.3 (CL - 7053647), 4.23.1 (CL - 9631420), 4.24 (CL - 1050688), 4.25 (CL - 10069288) ...
If a hot reload is performed after adding a custom UserDefinedEnum class to the project, the Editor will crash.
UE - Foundation - Core - Nov 17, 2015Performing a hot reload in the Editor after adding a custom UserDefinedEnum C++ class to a project results in a crash. A normal compile in Visual Studio will complete successfully. ...
Crash When Building HLODs
UE - World Creation - Worldbuilding Tools - HLOD - Aug 21, 2019Building HLODs causes a crash. This only seems to occur in some levels as shown in the attached project. Found in 4.22 CL# 7053642, 4.23 CL# 7948402, 4.24 CL# 8124506 ...
TAttributeContainer::CopyFrom crashes when container contains invalid bone indices for active mesh
UE - Anim - Runtime - Jun 16, 2024Currently there's no validation within the animation attribute container that bone ids are valid. This means that client/game code can add attributes with invalid bone ids into the container and th ...
NiagaraSystem with EniagaraGpuComputeTickStage::PostInitViews rarely crashes due to multi-thread race conflicts
UE - Niagara - Mar 1, 2025NiagaraSystem with EEiagaraGpuComputeTickStage::PostInitViews should not have bSupportsParallelGDME because of possible multi-threaded contention, but FNiagaraSystemInstanceController::GetGpuCompute ...
Crash when modifying BP custom event after deleting BP function
UE - Gameplay - Blueprint - Mar 24, 2017If a BP function contains a Create Event node, deleting the function will cause the editor to crash when modifying any custom event of that BP. Regression: No - same behavior occurs in 4.14.3 Binar ...
Creating External Curve for a function's local struct variable causes editor to crash
UE - Gameplay - Blueprint - Sep 6, 2016Defining a FRuntimeFloatCurve inside a code based struct causes the editor to crash if the struct is added as a local variable to a blueprint function and the "Create External Curve" button is press ...
In Packaged builds, Chaos Cache Manager can't animate Geometry Collections with Nanite Enabled if Cache Mode is set to Static Pose
UE - Simulation - Visual - Feb 27, 2025In Packaged builds, Chaos Cache Manager (CCM) can't animate Geometry Collections (GC) with Nanite Enabled if Cache Mode is set to Static Pose. The licensee tried to animate a CCM using Sequencer onl ...