Crash on attempt to clear(NullifyInstance) of duplicated Hierachial Instanced Static Mesh

Tools - May 31, 2019

When creating an C++ Actor with a Hierarchical Instanced Static mesh. when duplicating such an actor with mesh instances, the instances are not visible on the level. In this state, calling HISM comp ...

Actors spawned by child actor components are selectable in the world outliner

UE - Editor - UI Systems - Slate - May 31, 2019

The actor assigned to a child actor component should only have it's properties modified on the template, as the actor is spawned dynamically by the component. We used to enforce this by automaticall ...

Package build crashes when using Niagara system on a Skeletal mesh

UE - Niagara - May 29, 2019

Packaging a project having a skeletal mesh with a niagara system attached to it in the scene causes the build to crash when running the executable.  I have attached the log and dmp files relevant t ...

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 ...

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 ...

Vive - Motion Controller Component - Low Latency Update Regression

UE - Platform - XR - May 22, 2019

Motion Controller component attachments lag behind parent. Not happening on Oculus Rift Workaround: Set "Disable Low Latency Update" on your Motion Controller Components to 'true'  User Sub ...

Engine crashes with AudioMixer if the sound is disabled in the system

UE - Platform - Linux - May 16, 2019

Seems like failure to init SDL device is not being properly propagated and something on the higher level keeps pushing commands to the (non-existent?) audio thread. Paging also [Link Removed] and [ ...

Niagara Sub UV Index ignored

UE - Niagara - May 16, 2019

Using the Particles.SubImageIndex has no effect on what portions of the a UV are rendered in Niagara. Tested in 4.21.2 (CL - 4753647), 4.22.1 (CL - 6063286), 4.23 (CL - 6533064) ...

Loading a map via File->Open Level... when it is already loaded in World Composition view does not reset actors to origin

UE - World Creation - Worldbuilding Tools - World Composition - May 14, 2019

Loading a map via File->Open Level or just by clicking on it to open it, when it is already loaded in World Composition view does not reset actors to origin. The actors instead keep the same positio ...