Unreal Engine Issues

StreamableManager completion callback can happen after being canceled in same frame

FStreamableHandle (used as part of the FStreamableManager system) has a CancelHandle function that stops it from calling any completion callbacks related to that handle (it could cancel the load req ...

Components added in Blueprint that want initialisation are not maintained by RerunConstructionScripts

When a native component that wants initialisation is added to a Blueprint actor in the Blueprint editor, the initialisation state of this component will not be correctly preserved by RerunConstructi ...

Networked Root Motion Sources can experience desynchronisation that is not present in animation root motion under forced adjustment

In a networked environment with high packet loss (or high forced adjustment factor), motion applied using Root Motion Sources can desynchronise under conditions that animation root motion does not. ...

IK Rig/Retargeter editors' Preview viewport doesn't display static mesh attachments

Many of the animation asset editors don't display static mesh attachments in the way that the anim sequence or anim bp editor do.  This prevents users from previewing characters that are built from ...

Deformer Graph editor Preview viewport doesn't display static mesh attachments

Many of the animation asset editors don't display static mesh attachments in the way that the anim sequence or anim bp editor do.  This prevents users from previewing characters that are built from ...

Motion Matching Database editor Preview viewport doesn't display static mesh attachments

Many of the animation asset editors don't display static mesh attachments in the way that the anim sequence or anim bp editor do.  This prevents users from previewing characters that are built from ...

Foliage Instanced Actor Created Outside Level Instance when moving Base

empty default value for a blueprint member variable in a custom k2node

User is attempting to find a blueprint member variable's default value in their implementation of UK2Node::NotifyPinConnectionListChanged(). but the expected value in FBPVariableDescription is empty ...

Node errors that block compilation aren't output in compiler results log

Errors from EdGraph nodes aren't being piped into the compiler results log.  This can make it difficult to track down what's broken in larger rigs. ...

Lumen indirect lighting artifacts when far from world origin

Lumen seems to not be using Large World Coordinates somewhere. The Lumen Scene develops artifacts at large distances (5000 KM) from the world origin. ...