Crash occurs when creating a New Level from the Levels window while it is pinned to the side bar

UE - Engine Scaling - Streaming - May 2, 2022

An assertion occurs when creating a New Level from the Levels window while it is pinned to the side bar. ...

Crash reimporting Skeletal Mesh that has an extremely high amount of LODs

Tools - Nov 14, 2017

I have attached the project I used to repro this as well. All you should need to do is reimport twice on the untitled skeletal mesh and it should crash ...

Camera set to Projection Mode Orthographic doesn't appear to be rendering Sky Atmosphere

UE - Rendering - Architecture - Sep 13, 2023

This is a regression. Tested in //UE5/Release-5.2 CL26001984 It appears Sky Atmosphere isn't rendered by a camera with projection mode set to Orthographic. ...

Show progress/cancel button during lengthy destruction fracture

UE - Simulation - Physics - Jul 25, 2014

When the 'Fracture' button is clicked on a Destructible Mesh made from SM_MatPreviewMesh_02, the editor immediately freezes and stops responding. ...

Shadowmapping broken in Android Vulkan Editor Preview

UE - Platform - Mobile - Systems - Oct 2, 2023

Changing bIsSpatiallyLoaded can cause an Actor to be duplicated during Play-In-Editor

UE - Engine Scaling - Streaming - World Partition - Dec 18, 2025

Changing bIsSpatiallyLoaded can cause an Actor to be duplicated during Play-In-Editor. As described in the steps to reproduce, if we keep swapping bIsSpatiallyLoaded state and save a Streaming Level ...

Distro GearVR package crashes on open

UE - Platform - XR - Jun 20, 2019

Since this is a shipping/distro build and the device must be unplugged from the machine to be used in the hmd, I am unable to get logging. Will try with developer mode on. The following warning is ...

Sequencer.AllowPausedClock makes Audio/Platform-clock sequences evaluate at a negative time after any earlier game pause

UE - ACT Character - Sequencer - Oct 17, 2026

5.8 added Sequencer.AllowPausedClock (on by default) in FMovieSceneTimeController_ExternalClock::OnRequestCurrentTime (MovieSceneTimeController.cpp): PausedTime = Context.World()>RealTimeSeconds - ...

[CrashReport][Assert] UnrealEditor-RHI!FRHIResource::MarkForDelete() [Engine/Source/Runtime/RHI/Private/RHIResources.cpp:49]

UE - Rendering - Architecture - Materials - Dec 18, 2024

One of the users described this issue as below. "At seemingly random times while working in the material graph, some action will cause a hitch or freeze, and quickly after the engine will crash, an ...

[CrashReport][Crash] UnrealEditor-Core!IMemoryReadStream::CopyTo()

UE - Rendering - Architecture - Apr 10, 2025

Intermittent crash in virtual texture transcode. Usually mempy from nullptr but also occasionally we see the same callstack with memcpy to random location. ...