Can't inherit from ALight without a linker error

UE - Gameplay - Feb 22, 2024

This is a regression from 5.3. It should be possible to inherit from ALight outside of the engine module without any sort of errors. Case: [Link Removed] ...

GamePad input commands for multiplayer all send to player 1

UE - Gameplay - Input - Nov 20, 2014

When setup for multiplayer, all players are able to move around and control the camera with the analog sticks but button presses of all controllers only affect player 1. ...

Skeletal meshes are not simulating physics

UE - Simulation - Physics - Feb 6, 2017

Skeletal meshes do not simulate physics when playing in viewport. They are not affected by gravity, nor do they ragdoll. This doesn't occur in UE4/Main. This occurs with Immediate Mode Physics of ...

[CrashReport] UE4Editor-MetalRHI.dylib!FMetalVertexBuffer::FMetalVertexBuffer()

UE - Graphics Features - Jul 25, 2017

This is a common Mac crash that has affected users since at least 4.14. Unfortunately users have not provided any descriptions of their actions when the crash occurred. ...

Data Tables can no longer import numeric enum values

Tools - Nov 1, 2017

Some changes to UEnumProperty::ImportText_Internal prevent this importing the stringified number (which is a float) as an enum value. This affects the JSON importer, and maybe the CSV one too. ...

Niagara Not Working with Volumetric Materials

UE - Niagara - Jul 13, 2018

Niagara will not work with Volumetric Materials. Found in 4.20 Preview 5 CL# 4173640 and 4.21 CL# 4207835 ...

Example 1.3: Constraint Profiles animation not working in ContentExamples

UE - Content - Content Example - Mar 25, 2022

This bug does not occur in //UE5/Release-5.0-EarlyAccess or in Release-4.27 making it a regression.  This also occurs in //UE5/Main  ...

Unable to write custom stencil using Draw Material To Render Target

UE - Rendering Architecture - Materials - May 20, 2022

The attached project was created in 4.27 and is rendered on render target when checked in 4.27. However, this does not reproduce in 5.0 or later. ...

Build failed executing script TagsAndFiles.xml.

UE - Foundation - Horde - BuildGraph - May 24, 2022

"Trigger" element has been removed from the BuildGraph, causing an error when running TagsAndFiles.xml. This problem was added in 5.0 and does not occur in UE4.X. ...

Double-clicking metasound graph input widget resets value to 1, but displayed value does not change

UE - Audio - MetaSounds - Nov 16, 2022

Reproduced 3/3 times. Issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. ...