Unreal Engine Issues
Unreal Engine Issues
Crash when quick binding a function in a class that extends LevelSequenceDirector
UE - Anim - Sequencer - Sep 16, 2020The purpose was to create a Level Sequence Director inheritance class so that the same event could be reused in multiple sequencers. Attempting to quick-bind this base Level Sequence Director event ...
Attached Project Crashing on Play When Using World Origin Rebasing with World Composition
UE - Simulation - Physics - Apr 18, 2017The editor is crashing in the attached project on PIE when World Origin Rebasing is enabled. According to the user, this did not occur in 4.13, but I was unable to test any further back than 4.15, a ...
Crash editor when open the level sequencer after updated 4.20
UE - Anim - Sequencer - Jan 8, 2019When migrating from the version before 4.20 to the version after 4.20, opening the level sequencer will crash. I think that there is a problem with conversion from SnapTimeInterval (FixedFrameInterv ...
PCG crash when using Attribute Remove Duplicates on partitioned data if one of those sets of data is empty
UE - World Creation - Procedural Tools - PCG Graph - Jul 3, 2025Context: In PCG, the Attribute Remove Duplicates node can be used to remove duplicate attributes from an array. Problem: The licensee has observed that using the Attribute Remove Duplicates node ...
FIndexedCurve::ScaleCurve returns invalid results
UE - Anim - Runtime - Feb 13, 2025Calling SetKeyTime in iterating KeyHandlesToIndices array can modify the array order, so it breaks the iterator. Perhaps ShiftCurve also has the same problem. Here is a work around: void FIndexedCu ...
Dirty Actors in WP lose their actor folder in the outliner (and cause warnings) on PIE
UE - World Creation - Worldbuilding Tools - World Partition - Mar 20, 2023From Licensee: You can reproduce this in stock by doing the following:Make a new 5.1 project with a new WP map (it can be empty)Put some actors in some folders in the outliner and save them/reload ...
Distance Cull Fade Node on Material does not work with Skeletal Mesh
UE - Rendering Architecture - Materials - Apr 22, 2022The licensee reports that this issue is caused by the following code not performing a Buffer update. .\Engine\Source\Runtime\Renderer\Private\ShaderBaseClasses.cpp void FMeshMaterialShaderElementD ...
Lyra standalone game instance crashes when Player #2 equips new weapon
UE - Gameplay - Input - Apr 5, 2022Discovered while testing Lyra project for //UE5/Main - Foundation Shelf - FAssetDataGatherer Stall Fix Smoke. This issue is NOT dependent on the shelf and occurs without the unshelved files. This ...
[CrashReport] Commandlet crash - UE4Editor_Engine!FAnimationUtils::CompressAnimSequenceExplicit() [animationutils.cpp:621]
OLD - Anim - Sep 7, 2017This is an infrequent commandlet crash that has affected a number of users exclusively in 4.17.1 (possible regression from 4.17.0?). There are also two instances of older cases in 4.13 and 4.15, bu ...
Niagara Crash : ExportParticleDataToBlueprint module causes buffer overrun
UE - Niagara - Aug 10, 2021This buffer overrun is probably caused by the ExportParticleDataToBlueprint module does not respecting the GPUAllocation Fixed Size setting in the module. In fact, out-of-range export data is not c ...