Crash When Loading a SubLevel With HierarchicalInstancedStaticMeshComponent and SphereReflectionCapture via the Levels Window

UE - Graphics Features - Aug 30, 2018

The editor crashes when loading a SubLevel with HierarchicalInstancedStaticMeshComponent and SphereReflectionCapture via the levels window. Working as expected in 4.19 CL# 4033788 Found in 4.20 CL# ...

Editor Crashes After Building Lighting with Blueprint Set to Native Parent Class: Light

UE - Graphics Features - Oct 26, 2017

Whenever a Blueprint set to Native Parent Class: Light is placed into a level, Editor crashes after building lighting. The Blueprint does not need to contain an actual light component to crash the e ...

Crash: Nativized AnimBP instances can assert on load in a cooked build with async loading enabled.

UE - Gameplay - Blueprint - May 9, 2019

This is a regression that was introduced alongside a memory optimization for Animation Blueprint assets. Suggested workarounds:Disable "Async Loading Thread Enabled" ORDisable Blueprint nativizati ...

[CrashReport] UnrealEditor-LevelEditor!FViewportClient::InputKey(FInputKeyEventArgs const &) [UnrealClient.h:851]

UE - Editor - Workflow Systems - May 27, 2021

Generated from CrashReporter ...

[AI] Crash in UGameplayDebuggerLocalController::OnDebugDraw

UE - AI - Debugging - Apr 27, 2024

UGameplayDebuggerLocalController::OnDebugDraw crashed with a dereferenced nullptr for CachedReplicator. ...

EQS Overlap test no longer recognizes custom Collision Object Channel

UE - AI - Nov 12, 2019

Environment Queries Ignore tests for Custom Collision Object Overlaps. Note: The expected behavior seems to have worked in 4.21, After following the steps to reproduce, I can verify a successful de ...

Editor crash when drag and drop the Image widget in a NamedSlot on the designer

UE - Editor - UI Systems - Apr 20, 2020

When first added as a child widget in NamedSlot, the child widget can be dragged and dropped onto the parent widget's designer. The following assert causes a crash. Assertion failed: ParentWidget ! ...