Ribbon particles moving fast are inconsistent in initial position.

UE - Niagara - May 21, 2019

The fast-moving ribbon particle trail looks different on the server and client. It looks as though the client was drawing the previous frame. ...

Project fails to package when given the name "Test" and Encrypt Pak ini Files is enabled

UE - CoreTech - May 22, 2019

Project fails to package when given the name "Test" and Encrypt Pak ini Files is enabled Error: UATHelper: Packaging (Windows (64-bit)): ERROR: No target name was specified on the command-line. ...

Attached Actor's Scene Components reset to default class values when moved.

UE - Gameplay - May 23, 2019

When attaching a Blueprint CameraActor; who has a child Blueprint component(point light component) to another object in the scene. The Blueprint Actor's Components will reset to default class values ...

When the particle system manager is enabled particle system components will always tick in start physics

UE - Niagara - May 24, 2019

The particle manager only accounts for the particle system component's attach parent's EndTickGroup. When setting the tick group through the actor component the TickGroup is set instead of the EndTi ...

Show Volumes command does not work correctly if volume was converted from brush

UE - Gameplay - May 28, 2019

Debug display using "show volumes" does not work for volumes converted from brushes. The reason is that bHidden = true is done in the constructor of ABrush. So, we will probably need to run SetVi ...

Crash when the location of actor changes while executing SetAnimInstanceClass

OLD - Anim - May 27, 2019

This issue doesn't occur at 4.21. It seems in 4.22 only. Bone is broken in the second SetAnimInstanceClass. It seems CurrentReadComponentTransforms doesn't update. [Workaround] ・Wait using timer ...

Keys applied in Sequencer to Exponential Height Fog's Fog Density (Second Fog Data) are applied to primary fog density

UE - Anim - Sequencer - May 29, 2019

Sequencer keys applied to an Exponential Height Fog actor's Second Fog Data | Fog Density are applied to the fog actor's primary Fog Density instead. Second Fog Data was introduced in 4.22. This w ...

Nested Structs don't work in the details panel

UE - Editor - UI Systems - Slate - Jun 3, 2019

Nested structs do not expand in the details panel whenever opening it in the full Blueprint Editor. Tested in 4.20.3 (CL - 4369336), 4.21.2 (CL - 4753647), 4.22.1 (CL - 6063286), 4.23 (CL - 66842 ...

Crash when opening a new level while opening Editor Utility Widget after opening and closing it multiple times

Tools - Jun 4, 2019

Crash when opening a new level with reopened EditorUtilityWidget after opening and closing it multiple times. The cause of this issue is that UEditorUtilityWidgetBlueprint :: UpdateRespawnListIfNee ...

Crash when loading iCloud/CloudKit SaveGame on iOS

UE - Platform - Mobile - Jun 5, 2019

"...it seems the crash occurs because it is trying to load an empty (0 byte) save file. Stepping through the code in Engine/Plugins/Online/IOS/OnlineSubsystemIOS/Source/Private/OnlineUserCloudInterf ...