check(PIEInstanceID != -1) fails when executing SeamlessTravel

UE - Gameplay - Mar 2, 2017

Per https://udn.unrealengine.com/questions/349614/checkpieinstanceid-1-fails-when-executing-seamless.html ...

bLightAttachmentsAsGroup doesn't work with default ACharacter setup which has a hidden capsule component as the root

UE - Graphics Features - Nov 15, 2016

https://udn.unrealengine.com/questions/318476/bug-light-attachments-as-group-not-working-on-char.html ...

Nvidia In-Game Overlay causing FPS Issues

UE - Graphics Features - Dec 14, 2017

When the Nvidia In-game overlay is enabled it appears to cause performance issues with the editor. If the editor is open before the overlay is enabled it does not seem to cause any issues. I stumble ...

Houdini CSV in Niagara in Blueprints doesn't seem to work properly

UE - Niagara - Jul 13, 2018

See https://udn.unrealengine.com/questions/444762/how-to-change-niagara-system-exposed-parameters-in.html ...

Pasting infinite bool section creates multiple sections on a track that does not support multiple rows

UE - Anim - Sequencer - Oct 21, 2022

Tracks that don't support multiple rows, can still have sections pasted on top of each other, which can lead to unexpected results. ...

Contact shadows bug in splitscreen

UE - Graphics Features - Dec 11, 2024

Screen Space shadows do not check the view boundary. This can cause extra shadows in split screen, as one view can cast shadows in another view. ...

Light Function and World Position in 5.4

UE - Graphics Features - Nov 4, 2024

When rendering a Light Function into the Translucency Lighting Volume, the World Position Material Expression returns the position relative to the Camera (unrotated), not the World. This can be mor ...

Editor Crashes When Reloading Textures in Debug Tools

UE - Editor - UI Systems - Slate - Apr 11, 2016

Crash occurs while Playing in Editor and debugging by reloading textures. Occurs for both Mac and PC. Regression: Does not occur in UE4.10 testing on Match 3 ...

Unable to Rename using the Right-Click Menu on El Capitan in Blueprints and Sources Panel

UE - Platform - Apple - Apr 4, 2016

Users are unable to rename a variable using the right-click menu within Blueprints, and the sources panel within the Content Browser. Regression? Yes. I tested the functionality of the right-click ...

Sequencer Attach track appears more offset than expected when using override instance data

UE - Anim - Sequencer - Jun 12, 2019

When using an attached track in combination with enabling override instance data it appears as though the object used in the attached track is offset more than expected (appears to be by roughly dou ...