Unreal Engine Issues
Unreal Engine Issues
Open Formats: glTF Import - importer truncates skeletal mesh bone influences to 4 per vertex
UE - VEI - Open File Formats - Aug 21, 2026cf https://forums.unrealengine.com/t/interchange-gltf-importer-truncates-skeletal-mesh-bone-influences-to-4-per-vertex/2745391/2 Original message The UE5 Interchange GLTF importer appears to trunc ...
FUniqueNetIdRepl::NetSerialize() crashes when embedded in a TArray() of structs.
UE - Networking - Jun 29, 2020Calling the NetSerialize() function of FUniqueNetIdRepl from a custom NetSerialize() causes a crash. This only seems to occur when the struct is part of an array RPC parameter. ...
[CrashReport] UE4Editor-UnrealEd.dylib!TBaseUObjectMethodDelegateInstance<false, UEditorEngine, TTypeWrapper<void> ()>::Execute()
UE - Platform - Apple - Nov 10, 2017This is a longstanding but low frequency Mac crash. Users have not provided any descriptions of their actions when the crash occurred. Callstack from Log[2017.10.26-22.22.57:828][183]LogSavePackag ...
EOS Voice plugin causes a crash after adding "DefaultPlatformService=EOS" to the DefaultEngine.ini then restarting the editor
UE - Online - Jan 10, 2022This is not a regression. Doesn't affect UE5. The editor crashes on start up after enabling EOS Voice Chat, and updating the .ini to include DefaultPlatformService=EOS. Removing DefaultPlatformServ ...
When a Niagara System has SimTarget set to GPUCompute Sim, CameraQuery is only returning data from the Player0 camera, ignoring the PlayerControllerIndex.
UE - Rendering - Architecture - Niagara - Nov 8, 2024When a Niagara System has SimTarget set to GPUCompute Sim, CameraQuery is only returning data from the Player0 camera, regardless of PlayerControllerIndex. The expected behavior would be to have the ...
Overriding blueprint function first in grandchild class then in child class renames grandchild function
UE - Gameplay - Blueprint - Nov 28, 2017If you have a blueprint A with a child blueprint B, and child of the child blueprint C, overriding a function with a return parameter originally declared in blueprint A in the blueprint C, and then ...
Gauntlet test warnings in QAGame Win64 Development BootTest
UE - Rendering - RHI - Sep 6, 2023QAGame Win64 Development BootTest: * Ensure: Ensure condition failed: oldValue == newValue [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\HAL\ThreadingBase.cpp] [Line: 311] oldVal ...
D3D HUNG crash with Aftermath result: CullLights
UE - Graphics Features - Apr 27, 2017This is a specific subset of D3D HUNG crashes from [Link Removed]. This JIRA is for the crashes with the following results from Aftermath: [105]LogRHI:Error: [Aftermath] Status: Timeout [105]LogR ...
Non-existing config file loading could cause memory leak
UE - Core - Systems - Oct 19, 2023The cause of this problem is the Engine has code paths which register a new allocated object to Map without deleting the previous object. In the repro project, whenever hitting Space Bar, the level ...
Regarding TObjectPtr performance regression
UE - Core - Systems - Jul 13, 2026This is from the linked EPS case: ============================== When 5.0 first introduced TObjectPtr, the guidance was that it would compile down to raw pointer access in Shipping builds to ensu ...