FAsyncIOSystemBase::QueueDestroyHandleRequest fatal error crash on launch or package

UE - Foundation - Core - Jun 23, 2015

Fatal error due to FAsyncIOSystemBase::QueueDestroyHandleRequest during launching and packaging projects. May be linked to: [Link Removed] ...

Timing appears to be different for the first call of tick

UE - Gameplay - Nov 30, 2016

Timing appears to be different for the first call of tick causing the camera to appear in a different area than what it was in 4.13 This issue appears to be a regression ...

Duplicated TextureLoadVirtualPageTable in GetCustomData functions in generated HLSL add to the total instruction count due to TextureLoad having side effects

UE - Rendering Architecture - Materials - Dec 4, 2024

When using materials with CustomData inputs, such as the Eye material with Iris Distance and Mask, Virtual Texture samples will increase the instruction count for each unique VTPageResult. Each cus ...

PlatformerGame has blank white background during intro cut scene on tvOS

Docs - Samples - Oct 10, 2016

Blank white screen during opening cutscene tvOS 10.0 ...

[Rhino UVS] - Texture map offset and repeat settings changed from Rhino to UE4

UE - Editor - Content Pipeline - Datasmith - Importer - May 16, 2018

Issue was reported by customer (Oct 15, 2018): [Link Removed] ...

AbsoluteWorldPosition and PDO not working correctly in SingleLayerWater calculations

UE - Graphics Features - Oct 1, 2021

The licensee has provided a recommended fix for this issue. Please see the UDN.  ...

WMR native plugin trigger axis not working

UE - Platform - XR - Nov 19, 2018

We are testing the new Windows Mixed Reality native support and have found that the trigger mapping to a button is working, but the trigger mapping to an axis is not, i.e. the event MotionController ...

Rounding errors are present in FJsonValue::TryGetNumber(int64&) and FMath::RoundHalfFromZero()

UE - Foundation - Core - Mar 8, 2019

A licensee reported a bug in rounding of a call to FJsonValue::TryGetNumber(int64&) with large values.  In investigating this, it appears that equivalent problems also exist in FMath:: rounding func ...

Landscape holes retain collision if Mip level changed to 1

UE - LD & Modeling - Terrain - Landscape - May 19, 2015

Landscape holes have collision if the mip level of the landscape is changed from 0 to 1. ...

Content Browser filters don't save their state

UE - Editor - Workflow Systems - Dec 16, 2022

Content Browser filters don't save their state anymore. This is a regression from 5.0 ...