If child actor component is already also overlapping something it's parent will not fire off an overlap event

UE - Gameplay - Jan 11, 2016

If the a blueprint has an overlap event and that blueprint has a child actor component with an overlap event then the child can stop the parent from firing off an overlap event if the child also ove ...

TMap does not serialize properly in specific circumstance when it contains a UObject property set to null by default

UE - Foundation - Core - Aug 8, 2018

A TMap containing a struct with a UObject reference property (set to nullptr by default) does not serialize properly for an instance where the UObject reference is set on the instance, but the TMap ...

Traveling away from, then back to the original map in multi-process PIE with the editor as a client causes an assert

UE - Networking - Mar 28, 2016

An assert is triggered in this case because in multi-process PIE, if the editor is a client, the PIEInstance of the world context remains at -1 (see UEditorEngine::PlayInEditor). If this client inst ...

Sequencer Playlist - Triggering a playlist will crash every other editor on a Multi-user session

UE - Virtual Production - Tools - Sequence Playlist - Nov 24, 2022

[Link Removed] ...

GPU-ARM Mali 400 series phones will render an Opaque Unlit Material as black

UE - Platform - Mobile - Feb 12, 2016

ARM Mali 400 Series GPUs are rendering Opaque Unlit Materials as Black instead of the designated color. This is a *regression* from 4.10.2.Devices where Issue OccursDevice NameBrandBug Description ...

Adding a Scene Capture 2D to Render Target will override Motion Blur settings in level

UE - Graphics Features - Nov 24, 2014

With a Render Target From Scene Capture 2D setup in a level , the motion blur settings from a global post process volume is overridden. Was investigating Scene Captures picking up Motion Blur when ...

Skeletal Meshes with Physics assets with less than 5 bodies will not use flag for Start Awake

UE - Simulation - Physics - Dec 8, 2015

When using a Physics Asset with 4 or less physics bodies the flag for Start Awake cannot be disabled, even if unchecked, when Simulate Physics is set to true. I've attached a project with assets f ...

Dragging control rig Blueprint onto a sequence will fail to create a new spawnable

UE - Anim - Sequencer - Jun 9, 2021

The class FControlRigObjectSpawner is set-up to spawn control rigs from a sequence, but it fails to implement and override for CreateNewSpawnableType, so spawnables can only be created by converting ...

Trying to set a variable in one element of an array of custom UObjects will set that variable for all elements in the array.

UE - Gameplay - Blueprint - Dec 29, 2014

If an array of custom UObjects is added to a class, changing the value of a UPROPERTY variable in one element of the array sets the same value in all elements of the array. ...

Trying to create a custom code class derived from ArrowComponent will result in the build failing in Visual Studio.

UE - Foundation - Core - Feb 11, 2015

Deriving a custom code class from UArrowComponent results in several link errors (LNK2001 and LNK2019) in Visual Studio when trying to build the project. ...