Placed level instance causes "!ActorInstanceGuid.IsValid()" assertion after changing WorldSettingsClass

UE - Engine Scaling - Streaming - Level Instances - Nov 13, 2023

Resaving the level using ResavePackagesCommandlet is a workaround. ...

Crouching/Uncrouching while standing on a physics object will cause the object to behave erratically

UE - Gameplay - Sep 7, 2016

Crouching/Uncrouching while standing on a physics object will cause the object to behave erratically. Even if the CharacterMovement component has Physics Interaction disabled, it will still effect t ...

Different Drag and Drop Behavior between Tile, List, and Column Views in the Content Browser

UE - Editor - Content Pipeline - Content Browser - Aug 11, 2015

In the Content Browser in the Viewport to the right of the Content Browser outliner (*see image): If you are in Tile View you can drag an asset into a folder in the same viewport and successfully m ...

Crash and Performance issues when Generating Foliage using the Procedural Foliage Volume

UE - World Creation - Worldbuilding Tools - Foliage - Feb 14, 2017

Users are reporting crashes and poor performance when generating foliage using the Experimental Procedural Foliage Volume tool. Regression? Yes, this does not occur in the previous engine version o ...

After closing PIE, Right click dragging is confined to the Viewport bounds

Tools - Oct 27, 2017

After holding any mouse button down and pressing escape to quit the game, using the right mouse button to move in the viewport locks it to the left and right bounds of the viewport. Sometimes moving ...

Memory Leak occurring when switching between levels in Standalone

UE - Foundation - Core - Oct 29, 2015

A memory leak seems to occur when switching between levels multiple times. This is being monitored by memreport full ...

Duplicating a blueprint that implements an interface and then removing that interface will cause compile errors that don't occur if the interface was removed from the original BP

UE - Gameplay - Blueprint Editor - Aug 1, 2020

See steps to reproduce. Looks like the fixup when saying Yes to "Would you like to transfer the interface functions to be part of your blueprint" doesn't work correctly on the duplicated BP. Inter ...

Custom node not working with material attributes

UE - Rendering - Architecture - Materials - Jul 15, 2024

Using Material Attributes as an input to a Custom Expression causes the HLSL Translator to create multiple CustomExpression# functions, for each used member of the Material Attributes, rather than u ...

AnimNotifies get reproduced more times than expected.

UE - Runtime - Animation - Sep 3, 2024

When setting an AnimNotify to an AnimationSequence, this AnimNotify can be triggered multiple times when only set once. This issue only happens when the mentioned AnimationSequence that contains the ...

Creating an exposed variable does not always update correctly to the bp's Details panel

UE - Gameplay - Blueprint - Feb 20, 2015

Creating an exposed variable does not always update correctly to the bp's Details panel. They will show as having multiple values until the bp is clicked off and back onto. ...