Distance calculation using World Position are rendering incorrectly when packaged or launched for iOS and Android

UE - Platform - Mobile - Jan 15, 2016

When using a calculating the distance between the Absolute World Position (Including Material offsets) and a set Vector value, the correct value appears rendering to a texture's UV in PC Mobile Prev ...

Ignore Base Actor Rotation set to false continues to ignore base actor rotation

UE - Gameplay - Apr 14, 2015

Setting Ignore Base Actor Rotation to false continues to ignore base actor rotation when standing on an object that is spinning. ...

AnimGraph not present in Child of AnimationBlueprint with Parent Class: AnimInstance

OLD - Anim - Sep 10, 2015

A Child Blueprint derived from an AnimBlueprint generated with AnimInstance as the parent class will not contain an AnimGraph. ...

Blueprint Instanced static meshes generated in construction script do not bake lighting properly

UE - Graphics Features - Mar 12, 2015

Blueprint's with an instanced static mesh that has instance components added via construction script will fail to build lighting correctly when the pivot is placed outside the lights radius. This ...

Crash on Mac when adding Convex Collision to a mesh converted from a brush

UE - Platform - Apple - Jun 6, 2017

This is one of the top Mac crashes occurring in 4.16. Caused by adding Auto Convex Collision to a mesh converted from a brush. Does not occur on Windows. User DescriptionsI was trying to add a conv ...

[CrashReport] ULevel::GetWorldSettings() - UMaterialInstanceThumbnailRenderer::Draw

Tools - Aug 29, 2017

This is a common assertion that has occurred since at least 4.14 and affected nearly 100 users. The callstack is similar to [Link Removed], which was marked fixed for 4.14. User DescriptionsUndoi ...

Physics replicates incorrectly on the Client-Side on sloped surfaces

UE - Simulation - Physics - Jul 30, 2019

Replicated objects don't behave correctly on the client-side on slopes when not sleeping. By placing two cubes on one another and slightly rotating the bottom one to create a very gentle slope, the ...

LogAudioMixer warning results in a decrease of performance

UE - Audio - May 21, 2020

Unable to reproduce. User believes it is directly related to the speaker they are using when it goes into standby mode. If they unplug the speaker, everything runs okay.  After receiving the warning ...

Reimporting sprite sheets does not work correctly if the editor has ever been closed and reopened since initial import

UE - Gameplay - Paper2D - Aug 1, 2020

UPaperSprite::PostLoad() now sets BakedSourceTexture, BakedSourceUV, and BakedSourceDimension (if AtlasGroup is nullptr). There's nothing in reimport that sets them, so they are stale/latch to the ...

No sound plays when using Oculus Spatialization Plugin

UE - Audio - Spatialization - Nov 10, 2021

The Oculus spatialization option is not producing sounds. In Test Rail I can see that the test related to this passed April 2021 in UE4. In UE5 it passed on Early Access in February 2021. ...