Crash when breaking Level Instance within Data Layer Asset

UE - World Creation - Worldbuilding Tools - World Partition - Feb 2, 2023

A crash occurs when breaking a level instance contained in a data layer.  This does not occur in 5.0.3, however the behaviors of Data Layers are different in 5.1 where the Data Layer asset is added ...

Selection Highlight cannot be disabled for Skeletal Meshes

Tools - Feb 7, 2017

Selection highlight cannot be disabled for Skeletal Meshes. They will always have the outline selection and some tinted selection over their faces. Static Meshes do not exhibit this behavior. This ...

StartPlayInEditorGameInstance doesn't consider bStartInSpectatorMode for client instances

UE - Networking - Nov 15, 2022

In UGameInstance::StartPlayInEditorGameInstance, the server instance will go through the normal process of creating the URL using BuildPlayWorldURL, which checks the FGameInstancePIEParameters' bSta ...

Unreal Editor crash on Datasmith import with VrayBlend Materials

UE - Editor - Content Pipeline - Datasmith - Importer - Jun 16, 2020

It seems like VrayBlend materials are crashing the Engine when importing them with Datasmith. This is a regression from 4.24.3 (CL-11590370) where the file imported successfully. This was reported ...

On mouse Down not firing for left click on Button widgets when using precise click

UE - Editor - UI Systems - Aug 31, 2017

When using the left mouse button to click and drag a button, the on drag detected will not fire even when using precise click. This was not the case in previous versions of the engine (Works as expe ...

[CrashReport] UE4Editor_Core!rml::internal::ExtMemoryPool::initTLS()

UE - Foundation - Core - Mar 16, 2018

No user comments in crash group 110 #if PLATFORM_MAC 111 // macOS expects all allocations to be aligned to 16 bytes, but TBBs default alignment is 8, so on Mac we always have to use ...

Ctrl+Dragging multiple pins at once will sometimes drop pins

UE - Gameplay - Blueprint - Oct 7, 2016

Ctrl+Dragging multiple pins at once will sometimes drop pins This is a regression. The same setup was working in 4.12.5, but isn't working in 4.13.1 & Main (4.14) User Description: Blueprint conn ...

Mobile Preview dynamic shadows not showing on Mac

UE - Platform - Apple - Dec 19, 2014

When Using mobile preview in the 4.7 preview build, or in the changelist provided, Dyanmic lighting is not showing shadows when changed to movable. Following the steps below, you will see no shado ...

PlayerController::PlayDynamicForceFeedback called through code does not fire

UE - Gameplay - Input - Feb 25, 2016

Calling PlayDynamicForceFeedback in code does not affect controller rumble. ...

Changing transform of simulated component during physics freezes motion

UE - Simulation - Physics - Oct 13, 2016

If something is executed before a SetActorRotation node on Tick inside of a SceneComponent class BP and then added to an Actor class BP, the physics will lag User Description: When using set rotat ...