Arithmetic assignment operators (e.g. +=, *=) in Niagara inputs are applied twice .

UE - Niagara - Jan 9, 2024

Arithmetic assignment operators seem to be applied twice when committed in the Niagara stack.  This occurs when entering *= 2.0 for example into a float input. This may be the result of the SNiagar ...

Gameplay Effects can hold stale references to GameplayTags when switching Gameplay Effect Component type

UE - Gameplay - Gameplay Ability System - Jan 9, 2024

Gameplay Effects can hold stale references to Gameplay Tags when the adding component is switched for a different type. The tags are serialised, and their presence can be confirmed with Reference Vi ...

Some debug modes do not work in PIE

UE - Platform - Mobile - Jan 9, 2024

It looks like the output of the debug pass is ignored, and the final output from the last frame before the pass was enabled is displayed instead. If the pass is modified to return a different textu ...

SGameplayTagQueryWidget constructed in SGameplayTagQueryEntryBox ignores UGameplayTagsManager::OnGetCategoriesMetaFromPropertyHandle

UE - AI - Jan 9, 2024

2 issues with SGameplayTagQueryEntryBox that a UDN customer noticed:We are binding a delegate to UGameplayTagsManager::OnGetCategoriesMetaFromPropertyHandle to customize how the categories are retri ...

Mouse lock on a widget in the RetainerBox is misaligned and locked in the wrong position in the standalone/package application

UE - Editor - UI Systems - UMG - Jan 9, 2024

Locking the mouse to a widget covered by a Retainerbox locks it in a different position in the standalone/packaging application than in PIE.  This does not happen if RetainerBox is disabled and the ...

NiagaraEmitter is saved with the different asset name when renaming with speceficed name

UE - Niagara - Jan 9, 2024

Renaming a NiagaraEmitter to a specific asset name changes it to an unspecified asset name. This happens only with NiagaraEmitter, not with other assets.  ...

ParticlePosition doesn't use Previous values

UE - Niagara - Jan 9, 2024

FHLSLMaterialTranslator::ParticlePosition does not return Previous information when request which can result in bad motion vector calculation. ...

WP HLOD Crash on Small Cell Sizes

UE - World Creation - Worldbuilding Tools - HLOD - Jan 8, 2024

Export Asset Task with Directory as Filename causes Editor Crash

UE - Editor - Content Pipeline - Jan 8, 2024

Cannot copy from the message log when building with Clang

UE - Editor - Workflow Systems - Jan 8, 2024

This was disabled for clang a long time ago in CL 3019423 due to a codegen crash but seems like the bug is fixed now ...