Ensure when adding more than one camera to world in VR mode

UE - Editor - Workflow Systems - Jun 13, 2017

Ensure condition failed: Lhs.CurrentNum == Lhs.InitialNum [Link Removed] [Line: 197] Array has changed during ranged-for iteration! Ensure occurs after dragging in multiple cameras into the world i ...

DirectX Tesselation Crash

UE - Graphics Features - Dec 12, 2017

Per UDN Licensee: I have 2 crash repro when enabling DirectX12, both linked to tesselation and still present in 4.18 stock engine and easy to reproduce. Crash 1 -Start editor with DirectX12 -Cre ...

Landscape Spline Width/Side Falloff does not respect Unreal Units.

UE - LD & Modeling - Terrain - Landscape - Nov 15, 2019

The user reports that the Landscape Spline Width and Side Falloff isn't respecting Unreal Units in the Editor. The usage for comparison is a Cube that is scaled up 7x to Splines that have a Width of ...

Android Random Startup Crashing

UE - Platform - Mobile - Sep 9, 2020

Licensees are reporting random crashes at startup, with randomly different messages, but it seems that all have a "low-address null pointer dereference".  The licensee believes that the phone someti ...

Non-terminating while loop when creating a new BP Actor and quickly switching between components.

UE - Gameplay - Blueprint Editor - May 14, 2024

It is possible for the while loop in UnrealEditor-SubobjectDataInterface.dll!USubobjectDataSubsystem::GetActorRootHandle(const FSubobjectDataHandle & StartingHandle) Line 815  to not terminate when ...

Instanced Static Meshes Incorrect Normals when Scaled Non-Uniformly

UE - World Creation - Worldbuilding Tools - Foliage - Apr 2, 2015

When comparing the World Normals of an Instanced Static Mesh being scaled non-uniformly to that of a regular Static Mesh, their normals do not match one another. I have attempted to look over the d ...

Replicated variables defined in Actor Component blueprints do not actually replicate

UE - Networking - May 1, 2015

Replicated properties defined in an actor component blueprint are not being replicated because UActorComponent::GetLifetimeReplicatedProps isn't adding the blueprint properties to the OutLifetimePro ...

FIndexedCurve::KeyHandlesToIndices not replicated causing crash.

Tools - Sep 1, 2016

FIndexedCurve::KeyHandlesToIndices is not replicated, and so seems to be permanently out of date. This isn't readily apparent when there are more keys than the default amount, but when removing keys ...

Nativized Packaging Fails When Delegates Have Same Output Parameters

UE - Gameplay - Blueprint Runtime - Dec 12, 2016

Attempting to package a project using Nativize Blueprint Assets that contains delegates that have the same output parameters (such as binding an event to the OnCanvasRenderTargetUpdate event as show ...

(Paper2D) Polygon Collision does not correctly rebuild when using rebuild collision node in packaged game

UE - Gameplay - Paper2D - Nov 29, 2017

With tile maps, Polygon Collision does not correctly rebuild when using rebuild collision node in packaged game. This issue does not appear to be a regression. Versions Tested: Issue occurs on all ...