Grandchild actor with IsEditorOnly enabled is duplicated during save the level.

UE - Gameplay - Components - Dec 6, 2019

IsEditorOnly is not reflected in grandchild actor when parent/child/grandchild are constructed with ChildActorComponent. This causes the issue that actor will increase incorrect when save the level. ...

A hidden dedicated server is launched when playing as client

UE - Networking - Jul 15, 2020

When we play in editor with the Play Net Mode set to Play as Client, a hidden dedicated server is launched. Previously in 4.24 the dedicated server would always launch with a visible command window. ...

Exposed Niagara User Parameter Enums are displayed as Integers

UE - Niagara - Sep 29, 2022

(Note: all enums seem to fail when exposed as a user parameter and changing the exposed int does not impact the result of the simulation) Add a rigid mesh collision query di to a scratch module pe ...

Tracks that manipulate byte properties may have different (non-deterministic) results even for the same frame

UE - Anim - Sequencer - Aug 13, 2024

This issue is relatively easy to reproduce, e.g., in the timing of switching between the two types of property operations within the same track. It seems to be easy to reproduce the above problem in ...

Exporting Alembic Skeletal mesh from UE4 to FBX causes a crash

Exporting an alembic skeletal mesh that has been imported and then exporting it to FBX using the asset actions options will cause a crash. Tested with: Crash - 4.13.0 Binary CL-3106830 Crash - 4.1 ...

Lighting still unbuilt in Content Examples Lighting map after building lighting and saving

UE - Graphics Features - Aug 28, 2016

Lighting needs to be rebuilt in Content Examples Lighting level every time the editor is reopened. If the user builds lighting, saves the level, closes the editor, then reopens the level, lighting ...

RemoteToolChainPrivate.key permissions issue with Microsoft account Windows users

UE - Platform - Mobile - May 14, 2020

Also have attach that exact RemoteToolChainPrivate.key file Logs when attempting to launch TM-ShaderModels Error:[Remote] Using private key at C:\Users\varun\AppData\Roaming\Unreal Engine\UnrealBu ...

Root Motion (RMFE) - Blend with cached pose causes inaccurate root motion

UE - Anim - Gameplay - May 28, 2015

With Root Motion From Everything enabled, a Blend node gives different results when feeding it Animation Sequences directly or when first using a Cached Pose. *Simple test project attached Two sce ...

Compile failure adding BTTask_RunBehavior C++ class to project

UE - AI - Dec 22, 2016

Error message in log is:CompilerResultsLog:Error: Error MyBTTask_RunBehavior.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl IGameplayTaskOwnerInterface::OnGameplay ...

Plugin Warden entitlement check "timing out" error

UE - Editor - Content Pipeline - Datasmith - Importer - Dec 28, 2017

A growing number of users are reporting the Plugin Warden entitlement check timeout error while attempting to import datasmith files. Some users have been able to resolve the issue, some have not. ...