Regression: "Play particle effect" anim notifies are not seen in the editor playing level sequence/matinee when Attached is set to false

UE - Graphics Features - Dec 21, 2017

Not Attached particle system is not seen in the viewport of the editor. This particle will be seen normally when PIE.  Regression? Yes. This issue is not reproduced in 4.17 version. You can simply ...

Foliage does not appear in capture target when using "Always Persist Rendering State" when the foliage count is over 1.5k

UE - World Creation - Worldbuilding Tools - Foliage - Jan 10, 2018

There is an issue occurring where Foliage does not appear in capture target when using "Always Persist Rendering State" when the foliage count is over 1.5k. The issue does not occur when the foliage ...

Spherecast against complex geometry is returning odd results

UE - Simulation - Physics - Sep 19, 2023

Turning on batching of sphere casts when colliding against complex gives incorrect results. Affects debug output and vehicle wheels and body movement. The issue is with the batch query mode which ...

Editor crash on loading a project after enabling the Tango plugin on Linux

UE - Platform - Linux - Aug 22, 2017

Enabling the Tango plugin on Linux causes the editor to crash on restart. Regression: No - Tango plugin not available in 4.16.3 (CL 3561208) ...

[CrashReport] UE4Editor_UnrealEd!SaveWorld() [filehelpers.cpp:359]

Tools - Aug 31, 2016

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: !bIsReentrant [L ...

Landscape Grass Output Instances begin to float when using the Retopologize Tool

UE - LD & Modeling - Terrain - Landscape - Mar 14, 2017

When using the Retopolgize tool on a landscape that is utilizing the Landscape Grass Tool, any pre-existing grass types will begin to float and transform their locations. The only way myself and th ...

Nativized widget with String table data crashes packaged game

UE - Gameplay - Blueprint - Jun 1, 2017

There is a crash that is occurring for packaged games that use the string tables and nativized blueprints. This issue only affects a packaged build of the game. Testing for this issue did not yield ...

Setting Lights, Static Meshes, and Actors to movable creates lighting error

UE - Graphics Features - Aug 15, 2017

There is an error that is occurring when using movable lighting with objects and actors that are also set to movable. This issue does not occur with objects or lights that are NOT set to movable. V ...

Decal creates lighting artifacts on edge of meshes

UE - Graphics Features - Aug 22, 2017

When using deferred decals there are artifacts that are caused by the emissive color of the decal when viewing the decals from a low angle. These artifacts appear as thin lines on the edges of the m ...

HTML5 packages cause an error when being launched onto Chrome 32/64-bit and Firefox 32-bit

UE - Platform - Mobile - Sep 27, 2017

Attempting to launch a project packaged for HTML5 on Google Chrome 32/64-bit or Firefox 32-bit results in an error. According to Nick Shin, this is due to asm.js and does not include in newer versio ...