Undoing alteration of a local variable's default value does not actually undo the alteration

UE - Gameplay - Blueprint - Jun 7, 2016

Undoing the alteration of a local variable's default value causes the Undo toast to appear but the alteration is not actually undone. Regression: No ...

Crash when Clicking on a Linear Color Default Value in an interface

UE - Gameplay - Blueprint - Jul 19, 2017

When selecting a default color for a linear color input for an interface. A crash occurs when trying to bring up the color picker. ...

BP-implemented BT decorator issues with 4.6 to 4.7 upgrade

UE - AI - Jan 20, 2015

Changes done to BTDecorator_Blueprint result in users not being able to upgrade their BP-implemented decorators to 4.7. ...

Crash when Playing in Mobile Preview with Capsule Direct Shadows

UE - Platform - Mobile - Jul 15, 2016

When Capsule Direct Shadows are enable, attempting to play in Mobile Preview will cause the preview to crash. ...

Packaged project crashes when playing sound from blueprint library with enum input after nativizing blueprints

UE - Gameplay - Blueprint Runtime - Aug 23, 2016

Packaged project crashes when playing sound from blueprint library with enum input after nativizing blueprints. Frequency: 5/5 Notes If nativize blueprints is turned off, the packaged project wor ...

Stop>Set Sequence>Play causes spawnables to be duplicated

UE - Anim - Sequencer - Aug 30, 2016

Stop>Set Sequence>Play causes spawnables to be duplicated There is an alternate repro (see attached image) that uses Create Level Sequence Player, but that one seems expected since it is, well, cre ...

REGRESSION: HierarchicalInstancedStaticMeshComponent LOD transitions are broken in 4.9 and Main

UE - Graphics Features - Aug 24, 2015

While testing another fix I noticed HISM LOD transitions are not working in Main or 4.9 branch. There is no screen-door effect and multiple LODs seem to be rendering simultaneously compared to 4.8. ...

Animation sub instances tick twice with a post processing BP

OLD - Anim - Sep 18, 2019

An animation's sub instances will tick twice per frame if a post processing BP is set. ...

ABI break in Pixel Streaming appearing in Packaged builds

PixelStreaming - Feb 24, 2022

WebRTC binaries do not have the correct headers and the headers need to be updated. Linux binaries also need to be updated to match the new headers. ...

[AI] Destroying an actor while using pooled actors with MassActorSpawnerSubsystem causes a nullptr exception crash

UE - AI - Mass - Mar 19, 2023

If an actor that is used in the pooled actor list of UMassActorSpawnerSubsystem is destroyed, it causes a nullptr exception in UMassActorSpawnerSubsystem::SpawnOrRetrieveFromPool. The subsystem atte ...