Mouse Not Being Locked to Viewport in PIE

Tools - May 3, 2016

The mouse cursor is not being locked to the viewport during PIE in versions 4.11 and up. This is inconsistent with the behavior that was seen in 4.10 because the mouse was locked to the viewport du ...

Go To Definition fails quietly for Native functions with no definitions

UE - Gameplay - Blueprint Editor - Aug 11, 2017

Go To Definition fails for Set and Map Utility nodes (does not seem to affect Arrays). A warning similar to the following appears in the output log:LogSelectionDetails: Warning: NavigateToFunctionS ...

Light Propagation Volume Occlusion Intensity not working as intended

UE - Graphics Features - Oct 26, 2017

Light Propagation Volume Occlusion does not affect scene as it should. The workaround in 4.17.2 is to disable DBuffer decals which will enable the Light Propagation Volume Occlusion. Occurs in 4.1 ...

ObjectScale returns a Cascade Mesh particle's XYZ scale as 1.0

UE - Niagara - May 13, 2020

Sampling a Cascade Mesh Particle's scale always returns XYZ as 1.0 This is a regression from UE4/Release-4.24.  This does NOT affect Niagara Mesh particles.  I've attached a Cascade (left example ...

[MetaSounds] The Members' detail panel does not accurately update after making an edit and selecting a different member

UE - Audio - MetaSounds - Jun 26, 2023

Note: This issue also affects MetaSound Patches and any Members Menu List Repro Rate: 5/5 Regression marked as No: issue was seen in 5.2 and 5.1  UE5+Release-5.2-CL-26001984 UE5+Release-5.1-CL- ...

Unable to play replays with custom GameNetworkProtocolVersion set at runtime

UE - Networking - Sep 20, 2023

It seems that when comparing the custom versions for a replay (in the "operator<<" defined in ReplayTypes.cpp), the value retrieved from the FCurrentCustomVersions is not the value set at runtime, b ...

Crash in editor after disabling AISystem in Worldsettings

UE - AI - May 16, 2018

After disabling the World Option bEnableAISystem, clicking with the right mouse button on the asset browers (in an empty place) casues the editor to crash. ...

Blueprint Billboard Components render Opaque in Editor but Translucent during PIE

UE - Graphics Features - Jan 28, 2016

Billboard components render translucent during play, but render opaque within the editor. Simply adding a billboard as a component to a new actor blueprint and placing it in the level will reproduce ...

Widget Component Does Not Cast Shadows From Certain Lights

UE - Editor - UI Systems - Oct 19, 2016

The widget component acts differently under different lighting types. For example it will cast a shadow if being lit by a directional light but won't otherwise. It also seems point lights affect t ...

Hang and log spam when making changes to a landscape material with the landscape editor open

UE - LD & Modeling - Terrain - Landscape - Jul 25, 2016

Editor hangs if changes are made to the material which is currently assigned to a landscape while the landscape editor is open. Also spams "LogMaterial: 0.03 seconds spent updating 1 materials, 1 i ...