Changes to Instanced Properties default value on BP not propagated to placed actors in the opened level

UE - Foundation - May 15, 2025

In UE versions 5.4 and onwards (as of CL 42589677 in Main), when an Instanced UObject property is defined in an Actor Blueprint, modifying the default value in the Blueprint does not propagate the c ...

Node Comments don't appear until the node is scrolled over after it is entered

UE - Gameplay - Blueprint - Nov 23, 2016

Node Comments don't appear until the node is scrolled over after it is entered This is a Regression. It was working in 4.13.2 but broken in 4.14. User Description: BP node comments hidden until m ...

[CrashReport] UE4Editor_Landscape!ALandscapeProxy::PostEditChangeProperty() [landscapeedit.cpp:3692]

UE - LD & Modeling - Terrain - Landscape - Jul 19, 2017

This is a common crash affecting users in 4.16. Unfortunately they have not provided any additional details. Source Context 3684 // Remove null layer infos 3685 EditorLayerSettings ...

[CrashReport] FGenericPlatformMemory::OnOutOfMemory | TArray<FCompressedChunk,FDefaultAllocator>::ResizeTo

UE - Foundation - Core - Jul 20, 2017

This is a common crash affecting users in 4.16, and has occurred since at least 4.12 for more than 200 unique users. The callstack has similarities to [Link Removed], and as-such may be out of our ...

[AI] Navmesh shows in editor but does not get loaded in PIE

UE - AI - Navigation - May 13, 2024

When using static or dynamic modifiers only navmesh, there are times that the navmesh will build and display correctly in editor, but it does not get properly loaded at runtime (PIE/SIE). The Recast ...

Costs of Static Lights on Render Thread

UE - Graphics Features - Jun 9, 2016

A Japanese developer's making a scene that has over 4000 static point lights. They thought the lights don't affect rendering in runtime. But they realized the RenderThread's costs become bigger. I ...

[CrashReport] Crash while snapping multiple actors at once

Tools - Aug 29, 2017

Crash occurs when selecting all actors and pressing "End" to snap them to the floor. This doesn't occur if you create a blank map and add a few actors to it. The specific conditions may need to be ...

[CrashReport] UE4Editor_Engine!USceneComponent::DestroyComponent() [scenecomponent.cpp:847]

UE - Gameplay - Components - Dec 1, 2017

[Edit]: This should no longer be a crash as of 4.19.2 - we should only get ensure() reports with this callstack. ===== This is a common crash coming out of 4.18. Users have not provided any descript ...

Crash when quick binding a function in a class that extends LevelSequenceDirector

UE - Anim - Sequencer - Sep 16, 2020

The purpose was to create a Level Sequence Director inheritance class so that the same event could be reused in multiple sequencers. Attempting to quick-bind this base Level Sequence Director event ...

GAS and single process PIE: modifiable static variables accessed by server and client

UE - Gameplay - Gameplay Ability System - Nov 16, 2022

See: UAbilitySystemGlobals::HandlePreLoadMap GAS features static variables that are modified by both server and client, thus result in issues in single process PIE where they access the same memory ...