Unreal Engine Issues
Unreal Engine Issues
Sequencer based Camera Shake throws an assertion when spammed
UE - Anim - Sequencer - Apr 7, 2022Activating a Sequencer based Camera Shake repetitively results in an assertion being thrown. Assertion failed: DestAllocationIndex != SourceAllocationIndex [File:D:\build\++UE5\Sync\Engine\Source\R ...
StructUtils plugin's `FInstancedStruct` in a CPP-defined struct in a `TArray` on an actor component defined in CPP and implemented in BP. Populating the instanced struct in an actor BP's class defaults breaks serialization of the class defaults.
UE - AI - May 30, 2025Context Instanced structs are great for holding simple data with the main advantage they have is a low memory overhead unlike instanced objects. Problem The problem is in StructUtils plugin's `FIns ...
Meshes with no UV Coordinates will break the UVs of other meshes contained in the same HLOD if they share a material
UE - World Creation - Worldbuilding Tools - HLOD - Aug 26, 2016Meshes with no UV Coordinates will break the UVs of other meshes contained in the same HLOD if they share a material this only occurs depending on the specific order ...
Character sliding down a surface can prematurely land before reaching a walkable floor
UE - Gameplay - Player Movement - Apr 3, 2024Under some circumstances, a character falling and sliding along a sloped surface may get hung up near the bottom of the surface before actually landing on the floor. This seems to occur when slidin ...
Add Actor World Offset does not work consistently with physics-enabled objects
UE - Simulation - Physics - May 3, 2022Add Actor World Offset does not work consistently with physics-enabled objects Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did not occur there, it is a regression ...
Make Bitmask node returns incorrect value when using custom Enum
UE - Gameplay - Blueprint - Jul 5, 2016When a custom enum is used as the Bitmask Enum of a Make Bitmask node, the value returned does not match the expected value ...
Crash when destroying a Widget Component during the OnAnimationFinished delegate of it's UserWidget
UE - Editor - UI Systems - Nov 4, 2016UserWidget animations will be ticked as part of the WidgetComponent's DrawWidgetToRenderTarget(). This will lead to a crash when we attempt to set the LastWidgetRenderTime to GetWorld()->TimeSeconds ...
[CrashReport] UE4Editor-CoreUObject!FPropertyProxyArchive::operator<<(FField * &) [PropertyProxyArchive.h:45]
UE - Foundation - Cpp Tools - Hot Reload - May 8, 2020Generated from CrashReporter Error message - Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address [different address per crash] ...
Editing an array config property via ProjectSettings can end up editing other platform config properties.
UE - CoreTech - May 27, 2024Platforms .ini config files can end up with incorrect data, due to how ProjectSettings manages the config data. On a Windows machine, if we open the ProjectSettings window, all the data is going to ...
Nanite can assert in ValidateFixupChunk: 'Assertion failed: HierarchyNodeIndex < Resources.NumHierarchyNodes'
UE - Graphics Features - Nanite - Aug 29, 2024Reported by a licensee. More discussion in the linked UDN case. "Sometimes the WorldPartitionBuilderCommandlet will fail after encountering this error:" Error: Assertion failed: HierarchyNodeIndex ...