FUniqueNetIdRepl::NetSerialize() crashes when embedded in a TArray() of structs.

UE - Networking - Jun 29, 2020

Calling 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. ...

ios threads freeze for almost one second when notifications pop up

UE - Platform - Apple - Mar 18, 2021

see the UDN .Setting bOtherAudioPlayingNow to always false can workaround the problem, but it's better to have a more robust solution. ...

Cross does not respond or crashes when "collide with attached children" is enabled

UE - Simulation - Physics - Apr 13, 2021

Fatal error! Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000 0x00007ffb09d32bb9 UE4Editor-Engine.dll!USkeletalMeshComponent::CopyClothCollisionsToChildren() [D:\ ...

The SetEmitterEnable BP function needs implementation

UE - Niagara - Mar 2, 2020

The BP function calls FNiagaraSystemInstance::SetEmitterEnable, which sets ExecutionState on the emitter instance to ENiagaraExecutionState::Inactive. FNiagaraSystemSimulation::PrepareForSystemSimul ...

Re-import Groom asset not working in UE5-Preview2

UE - Editor - Content Pipeline - Datasmith - Mar 16, 2022

When "re-import" or "re-import with new file" a groom asset in UE5 Preview2, the groom failed to update with the new data/file, still ...

HLOD build fails depending on the value of Loading Range in the World Settings

UE - World Creation - Worldbuilding Tools - HLOD - Jun 14, 2022

HLOD actors are generated on the outliner, but no geometry is generated. An error occurs in the output log. ...

Large distant objects lose skylight lighting

UE - Graphics Features - Jul 18, 2022

[Bink Audio] - Bink not playing back wave files with 8000Hz Sample Rate

RAD - Jan 3, 2023

Wav files with 8000Hz sample rates can be imported into the editor, but fail to play with the Bink compression setting. PCM, ADPCM, and Vorbis work as expected. LogAudioDerivedData: Warning: Cooking ...

HiddenInGame issues with Nanite enabled meshes

UE - Graphics Features - Nanite - May 15, 2024

Nanite meshes marked Hidden in Game do not have selection outlines in the editor. ...

WindowsVideoRecordingSystem can start late to record when a Record/Start action is executed.

UE - Media Framework - May 30, 2024

The WindowsVideoRecordingSystem can start to record late when a StartAction is done. Not sure if it starts to record late, or the first seconds of the resulting video are ommited when the mp4 file i ...