Moving forward via the scroll wheel will cause the loss of movement in the viewport

Tools - Apr 30, 2019

When using the scroll wheel to move, the user will gradually come to a stop when going forward and will increase in speed when moving backward. If the user moves forward using this method until they ...

Adding an entry to arrays within Details Panels automatically collapses expanded entries

UE - Rendering Architecture - Materials - Apr 3, 2019

Adding an element to an array in the Material Editor automatically collapses all expanded elements in the array. I've successfully reproduced this issue with the following nodes:LandscapeGrassOutput ...

Crash using VisualizeTexture command with texture id

UE - Graphics Features - Jul 1, 2019

Crash always occurs when executing Visualize Texture Command with Texture id. Looks like GVisualizeTexture.Mode doesn't affect correctly. Workaround: VisualizeTexturePresent.cpp FVisualizeText ...

Noise Node Fails to Compile With Voronoi Noise if Ray Tracing is Enabled

UE - Graphics Features - Jul 19, 2019

Noise Node Fails to Compile With Voronoi Noise if Ray Tracing is Enabled.  Working as expected in 4.22 CL# 7053642 Found in 4.23 Preview 2 CL# 7321677 and 4.24 CL# 7437539 This is a regression   ...

Left Clicking a menu that contains an option with a submenu will cause the submenu to close while hovering its options

UE - Editor - UI Systems - Mar 25, 2022

If a menu has an entry that is a submenu, and that submenu has entries in it that are also submenus, then the entire menu will close when left clicking the submenu button instead of hovering it. So ...

BlackmagicMediaSource causes a memory leak if "Just-In-Time Rendering" option is ON.

UE - Virtual Production - IO - Media - Oct 31, 2023

Since 5.3, BlackmagicMediaSource causes a memory leak. This didn't happen on 5.2. You can see the leak on PIE. [Image Removed] [Image Removed] If "Just-In-Time Rendering" option in the MediaB ...

Blueprint Editor: BP functions display dropdown instead of checkboxes for uint8 enum parameters

UE - Gameplay - Blueprint Editor - Aug 8, 2017

I traced through the callstack and it looks like the problem is as follows:in order for the BP function to compile, its enum parameter must be uint8, because that is the only type supported by BP fu ...

Distance Fields no longer work with instances when PIE/Simulate

UE - Graphics Features - Apr 20, 2015

When using distance fields with instance meshes from the foliage tool everything works correctly, however, when simulating or PIE the distance fields will be removed. This working correctly in 4.7.5 ...

Project Settings -> Engine -> Collision : Scrollbar initially missing

UE - Editor - UI Systems - Slate - Jun 20, 2016

If the Project Settings window is sized to the point a scrollbar is needed to read the complete text for Collisions Settings, expanding "Preset" will result in the scrollbar not appearing initially, ...

Skeletal mesh always registers as Dynamic when testing collision

UE - Gameplay - Oct 26, 2016

Skeletal meshes do not respect collision changes from World Dynamic, always returns as Dynamic. Regression (no) issue (does) occur in 4.12.5 ...