Map Find node keeps a stale value on the value output pin from a previous call even if it returns false

UE - Gameplay - Blueprint Compiler - Jul 13, 2017

See repro and screenshot. ...

Updating to 4.13 from 4.12 Causes Particle System Orientation to Break When Cooked

UE - Graphics Features - Sep 16, 2016

When updating a particle system with the mesh data type to 4.13 its orientation will change after being cooked. This issue will not appear with PIE, or Stand alone you must Launch from editor. A 4.1 ...

Game instance spawning object crashes .exe in packaged project

UE - Gameplay - Blueprint - Mar 19, 2015

If an actor is spawned using game instance blueprint, a packaged .exe will crash upon loading. Frequency: 2/2 Crash Reporter: [Link Removed] ...

Retopologized landscapes ignore collision when mip level set to 1

UE - LD & Modeling - Terrain - Landscape - May 14, 2015

Object collision ignores landscape components that have been retopologized if the landscapes collision mip level is set to 1 instead of 0. ...

Game does not exit when exited through SteamVR UI

UE - Platform - XR - Oct 13, 2016

Previously the game would crash (see: [Link Removed]), but the fix now keeps the game running without VR instead. ...

Reimporting skeletal mesh clears material references from material slots

Tools - Jan 30, 2017

This occurs in //UE4/Release-4.15, //UE4/Dev-Editor, and //UE4/Main Does not occur in 4.14.3 ...

LandscapeComponent generates incorrect OccluderVertices for software occlusion

UE - LD & Modeling - Terrain - Landscape - Sep 17, 2019

OccluderVertices didn't consider the subsection's transition, so the position of the OcclusderVertices are not correct. I made a fix as follows: [Image Removed] [Image Removed] ...

Text cannot be displayed when switching languages if a text is constructed using LocalizationTable at runtime.

UE - Editor - UI Systems - Localization - Dec 5, 2022

Using LocalizationTable in text localization does not switch text correctly. This is not a problem in UE4.27, but it is a problem in UE5.0 and later.  ...

Volumetric fog rendering gets cut off at the apex for some spot lights when viewed from certain angles

UE - Rendering Architecture - Apr 19, 2023

Fix is found in licensee’s pull request:https://github.com/EpicGames/UnrealEngine/pull/10333/files ...

[CrashReport] UE4Editor_MaterialEditor!SMaterialLayersFunctionsInstanceTree::UpdateThumbnailMaterial() [smateriallayersfunctionstree.cpp:1128]

Tools - Feb 27, 2018

No user comments in crash group 1114 for (TSharedPtr<FStackSortedData> Group : AssetChild->Children) 1115 { 1116 if (Group->ParameterInfo.Association == InAssociation) ...