Adjusting properties of a Blueprint instance's components in the level does not update references to the properties in the BP's Construction Script

UE - Gameplay - Components - Oct 6, 2015

Adjusting properties of a Blueprint instance's components in the level does not update references to the properties in the BP's Construction Script. Note: this would work in 4.8.3. Reproduced in 4. ...

Bugs with Material Instances and Landscape Grass

UE - World Creation - Worldbuilding Tools - Foliage - Apr 14, 2016

Need to fix the Bug: Parameters that linked to LandscapeGrassOutput in master material instance do not updates automaticaly in viewport. After parameters change you are have to modify any of your us ...

Crash when using automated groom import

UE - Editor - Content Pipeline - Import and Export - Jan 5, 2021

UDN customer reported that using automated groom import through Blueprint was crashing. This can probably be reproduced with a Python script using an asset import task with the automated flag set to ...

Collisions doesn't work at BeginPlay against Instanced Meshes if their Mobility is Static

UE - Simulation - Physics - Jul 1, 2015

User reports that in 4.8 in some cases bodies for Static-mobility ISMC instances are not yet initialized when BeginPlay is called. It seems like deferred creation for level streaming should be com ...

Misspellings in Material_Properties level of ContentExamples

Docs - Samples - Jan 18, 2017

In the Material_Properties level of ContentExamples, separate is misspelled in demo display 1.6 and tessellation is misspelled in demo display 1.8. ...

Adding Components via Editor Utility Widgets does not add component to Details panel

UE - Framework - Blueprint Editor - Nov 14, 2022

Using the Editor Utility Widget to add components to objects in UE does not appear to function as expected. I reproduced this 8/8 times in UE 5.1, 5.0, and 4.27, confirming that this is not a regres ...

Game window renders transparent when launched with -game -log commands on Mac

UE - Platform - Apple - Oct 31, 2016

This is only occurring on Mac and only in OSX 10.12. This is also a regression from 4.13 Right clicking in the dock, Show all windows, and selecting the game window does NOT fix the issue. Runnin ...

Crash when Toggling Landscape Mode with Hidden Sub-Level containing a Landscape

UE - LD & Modeling - Terrain - Landscape - Oct 28, 2016

A crash occurs when you have a hidden Sub-level containing a landscape and you attempt to toggle the Landscape Mode after re-opening the project. The licensee has authored their own fix for this is ...

Source assumes that TG_PrePhysics is the first tick group

UE - Gameplay - Feb 16, 2016

Licensee has reported an issue with the source code and proposed a fix. The issue is that the source is assuming that TG_PrePhysics is the first tick group in all cases. Information can be found abo ...

Offset Root Bone Node needs reconstruction from velocities

UE - Anim - Jul 16, 2025

The experimental Offset Root Bone node does not respect velocities, meaning that it does not work when a character is based on a moving platform. The capsule will rotate with the platform, but the r ...