Creating multiple Scalar Parameter nodes with a different values will crash the editor

UE - Rendering Architecture - Materials - Mar 11, 2020

This is a regression from 4.24.3 CL 11590370 This was discovered when ad-hoc from home I ran into this by running this set up https://docs.unrealengine.com/en-US/Engine/Rendering/Materials/HowTo/Cle ...

Attached Project Crashes When Compiling Character Blueprint

OLD - Anim - Feb 10, 2016

The user's project is crashing during compilation of one of their character blueprints. We have not been able to reproduce this issue in a clean project, as the repro steps are unknown outside of t ...

Niagara Mesh Renderer Incorrectly Rendering Mesh at Distances When Using Two Sided Material

UE - Niagara - Mar 25, 2019

Niagara Mesh Renderer Incorrectly Rendering Mesh at Distances When Using Two Sided Material.  Working as expected in 4.20 CL# 4369336 and 4.21 CL# 4753647 Found in 4.22 Preview 6 CL# 5439949 and 4 ...

Crosshair and hand no longer present in Blueprint Editor

UE - Gameplay - Blueprint Editor - Feb 20, 2017

In 4.14 and earlier version hovering the mouse over a pin would change the mouse into a crosshair shape, then if you were to press and hold the Ctrl key and drag with the mouse, it would change into ...

Crash occurs when debug filter pop out tab is clicked while in line tab is present

UE - Editor - UI Systems - Slate - Jun 29, 2017

There is a crash that is occuring when resizing windows with the debug filter popped out. The Debug filter that gets popped out is persistant and does not disappear when the the in line option appea ...

Ragdoll Physics Assets Move Sporadically After Ragdoll Physics Event Invoked

UE - Simulation - Physics - Character - May 3, 2022

Occurs 3/3 times. Skeletal mesh with ragdoll physics applied exhibits sporadic motion after ragdoll physics is initiated.  Regression does occur: When tested in //UE4/Release-4.27.2 @ CL18319896 n ...

Startup Movies in Lyra Flicker and trigger ensure: "Only one system can use the SlateThread at the same time. GetMoviePlayer is not compatible with PreLoadScreen."

UE - Media Framework - Dec 20, 2023

When adding startup movies to Lyra, the movie playback flickers and an ensure conditions fails with the message: Ensure condition failed: bSuccess [File:D:\build\++UE5\Sync\Engine\Source\Runtime\M ...

Mover character flickers downward while crouched and moving every so often

UE - Gameplay - Player Movement - Mover - May 8, 2025

Repro Rate 5/5 Packaged onWindows - 10 - Enterprise - L3864 Processor: AMD Ryzen Threadripper PRO 3975WX 32-Cores 3.50 GHz RAM: 128 GB GPU: NVIDIA GeForce RTX 3080 GPU Driver Version: 572.83 ...

Collision for bsp stays in level after bsp is deleted

UE - LD & Modeling - Modeling Tools - BSP - Jun 30, 2015

If a bsp brush is deleted from a level, the level has geometry built, and the user presses play then uses the "show collision" console command, the collision for the bsp wlil still appear. This does ...

Outline artefact on cascade shadow transition

UE - Graphics Features - Mar 28, 2024

Some pixels at the edge between cascaded shadow maps and distance field shadows can be skipped by both, leading to unshadowed pixels. Licensee reports the bug happening in 5.3 as well. Test project ...