Unfocused Standalone window has reduced performance

UE - Rendering Architecture - RHI - Aug 25, 2020

User description: When I run two windowed standalone instances to test multiplayer, the unfocused window gets about 2-5 fps...but if I focus on it, smooth 120fps, yet the opposite screen is now onl ...

Crash when spawning actor with no viewport initialized

UE - Editor - Workflow Systems - Nov 22, 2023

If an attempt to spawn an actor is made before the Level Editor Viewport is fully initialized (i.e. before it has had a chance to get rendered at least once), and that actor has no specific Factory ...

[CrashReport] UE4Editor_PropertyEditor!FDetailCategoryImpl::GetParentLayoutImpl() [detailcategorybuilderimpl.h:168]

Tools - Aug 22, 2016

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: IsValid() [Link ...

[CrashReport] Crash in TerminateOnDeviceRemoved() - DXGI_ERROR_DEVICE_HUNG

UE - Graphics Features - Aug 29, 2016

Error message: Fatal error: [Link Removed] [Line: 176] Unreal Engine is exiting due to D3D device being lost. (Error: 0x887A0006 - 'HUNG') Source Context: 161 162 const TCHAR* Reas ...

TeleportTo result with Chaos is different from PhysX

UE - Simulation - Physics - Jun 25, 2021

The result with Chaos is not wrong, rather it returns a correct correction vector, that vector is perfectly horizontal to the teleport buried against the landscape mesh. Therefore, teleportation wil ...

[CrashReport] UE4Editor_CoreUObject!UObject::CreateDefaultSubobject() [obj.cpp:118]

UE - Foundation - Core - UObject - Apr 4, 2017

Was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Fatal error: [Link Removed] [Line: 117] No o ...

Expose light depth and position to Light Functions

UE - Graphics Features - Oct 14, 2019

Users have requested that light depth and light position are made available to Light Function Materials.Light Depth We seem to be calculating the per-pixel distance from the light to the surface in ...

Gauntlet test warnings in QAGame Win64 Development BootTest

UE - Rendering Architecture - RHI - Sep 6, 2023

QAGame Win64 Development BootTest: * Ensure: Ensure condition failed: oldValue == newValue [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\HAL\ThreadingBase.cpp] [Line: 311] oldVal ...

Map placed actor binding to another actor's Event Dispatcher (multicast delegate) results in duplicate bindings after blueprint recompile

UE - Framework - Blueprint - Apr 17, 2025

Context Blueprint actors placed on the map can bind to another actor's event. If an ActorB has a reference to ActorA, it can bind to an event dispatcher in A by creating an event node in ActorB's e ...

Crash in UEditorEngine::CheckForWorldGCLeaks

Tools - Feb 20, 2017

Error message: Fatal error: [Link Removed] [Line: 1959] /Game/FirstPersonBP/Maps/FirstPersonExampleMap.FirstPersonExampleMap still around trying to load ../../../Engine/Content/Maps/Templates/Templ ...