Crash on hot reload for DynamicDelegate

UE - Foundation - Core - Mar 23, 2020

This issue may be badly implemented, but the reference to the VTable may be incorrect during a hot reload. Crash always in sample project. Summary:Call ForeachRow function in Custom Struct constr ...

A crash can occur when modifying a user-defined struct asset that's indirectly accessed through a variable node.

UE - Gameplay - Blueprint Editor - May 11, 2021

If a user-defined struct-type variable is declared in one Blueprint, and that variable is then indirectly accessed in a second Blueprint through a reference to the first Blueprint, modifying the str ...

Extracting Sprites from Padded Non-Power of Two Textures are Offset

UE - Gameplay - Paper2D - Oct 12, 2015

Extracted Sprites are offset when importing a non-power of two sprite sheet, padding it to a power a two mode, and then using the extract function. You can see this offset clipping of the extracted ...

Material Compile Error [SM5]

UE - Graphics Features - Jun 8, 2016

There is an material compile error when using a TexCoord node shared between two Texture samples. The user provided a number of ways to work around the issue, but this issue becomes more problemati ...

Distance Field AO not Rendering in VR

UE - Platform - XR - Mar 24, 2017

Distance Field Ambient Occlusion does not render in VR. I mentioned to the user reporting this issue, that using DFAO is more than likely disabled by default due to the baseline cost of using the ' ...

UKismetArrayLibrary::GenericArray_Shuffle is weighted to return some results more than others

UE - Gameplay - Aug 15, 2017

The implementation of UKismetArrayLibrary::GenericArray_Shuffle() will generate certain array shuffle results more often (up to three times as much) than others, rather than having a roughly equal c ...

Volume EncompassesPoint is broken in Chaos

UE - Simulation - Physics - Oct 26, 2020

While investigating an issue with Cull Distance Volumes, I noticed that AVolume::EncompassesPoint has a broken default implementation when WITH_PHYSX is not defined. If only chaos is enabled it will ...

Descriptions for vis log shapes in the Rewind Debugger are misaligned

UE - AI - Debugging - Mar 25, 2025

When recording shape information, descriptions are offset from the shape. Licensee Message - I noticed that the capsule vis log description labels were not lining up after replaying the recording ...

[Feature Request] FWebBrowserWindow::UnbindUObject of IOSPlatformWebBrowser.cpp is not implemented yet

UE - Platform - Mobile - May 23, 2018

FWebBrowserWindow::UnbindUObject on iOS is not implemented yet.  IOSPlatformWebBrowser void FWebBrowserWindow::BindUObject(const FString& Name, UObject* Object, bool bIsPermanent /*= true*/) { } ...

Crash in FMaterialUtilities::CreateFlattenMaterialInstance when building Simplified HLOD layer

UE - World Creation - Worldbuilding Tools - HLOD - Aug 17, 2022

From licensee: The issue here starts in FVoxelizeMeshMerging::ProxyLOD() where the FlattenMaterial created using FMaterialUtilities::CreateFlattenMaterialWithSettings() returns an empty struct. I d ...