Burn ins are not composited onto media renders using the MRQ

zComponent - Archive - Jan 17, 2023

In 5.1 media exports will not have the burn in composited onto them.  ...

drag the progress bar in level sequence would crash in debug editor

zComponent - Archive - Aug 17, 2023

it seems in FSequencerTimeSliderController::ComputeFrameTimeFromMouse the CursorPos is -nan ...

Scrubbing the timeline in Sequencer can hang the editor when operating on constrained actors with complex control rigs

UE - ACT Character - Anim in Engine - Sep 11, 2026

The issue is caused by UAnimDetailsProxyManager::ForceUpdateProxyValue triggering evaluation of constraints that are attached to control rigs. When scrubbing, requests to ForceUpdateProxyValue are ...

FXmlFile asserts on valid empty XML documents

Tools - May 5, 2016

Code asserts because it assumes that a self closing node is within another node or has another node left in the doc to parse ...

Disabling "Should Be Visible" On a Streaming Level Resets Variable Values

UE - Gameplay - Jan 6, 2017

When disabling "Should be Visible" of a stream level and then enabling it again, the values of variables in a Blueprint that has been placed in a stream level maintain their value in PIE but reset t ...

Impossible to reparent blueprint class that has a broken parent class when using compilation manager

UE - Gameplay - Blueprint Compiler - Dec 8, 2017

Alternatively use BP_ParentClassIsMissingType in QAGame ...

CachedLocalBounds is incorrectly updated

UE - Anim - Gameplay - Apr 19, 2019

USkeletalMeshComponent::CalcBounds updates CachedLocalBounds by transforming the world FBoxSphereBounds, by the WorldToLocal transform, which is not sufficient to calculate the bounds in local space ...

Animation import with "Force Front X Axis" is broken until a re-import

UE - Editor - Content Pipeline - Import and Export - Apr 24, 2019

A camera set to Orthographic projection mode with a negative Ortho Width will crash the editor on PIE

UE - Graphics Features - Jan 22, 2015

A camera set to Orthographic projection mode with a negative Ortho Width will crash the editor on PIE. Reproduced in Main (CL-2412886) Crash Report: [Link Removed] Call Stack:<unknown module>! UE ...