Unreal Engine Issues
Unreal Engine Issues
Closing The "Find in Blueprints window" deadlocks main thread
UE - Gameplay - Blueprint Editor - Aug 24, 2020When performing a Find in Blueprint search (Ctrl + Shift + F), and after a search is made and the search window is closed, the Editor becomes unresponsive and the user is forced to quit the Engine. ...
A bug in UBTService_BlueprintBase makes it impossible to create "deactivation-only" BP implemented BT services
UE - AI - Jan 22, 2016A bug in UBTService_BlueprintBase makes it impossible to create "deactivation-only" BP implemented BT services. ...
'Stat Collision' Console Command appears twice in PIE list
Tools - Nov 3, 2016'Stat Collision' Console Command appears twice in PIE list Regression (no) issue (does) occur in 4.12.5 ...
AssetManager does not correctly call delegates if bShouldUseSynchronousLoad is true
UE - Gameplay - Oct 3, 2018There's a bug in UAssetManager::LoadAssetList where the passed in DelegateToCall is not being called in the bShouldUseSynchronousLoad case. This can cause gameplay logic to fail when that bool is tr ...
Assertion failed: ExportSettings == *ExistingExportSettings [File:D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\Lightmass\Lightmass.cpp] [Line: 546]
UE - Graphics Features - Sep 12, 2023Generated from CrashReporter Logs can be obtained via Crash Reporter ...
Shadows Appear when Approached and Disappear when Distant on Movable Objects
Docs - Samples - Sep 21, 2016While working on writing test cases for content examples, I discovered that the shadow behind certain objects appear and disappear depending on the distance from the camera. This might be similar ...
Mesh Variation node usage inside macro - lost of material slot name
UE - Anim - Mutable - Nov 14, 2025When using a mesh variation node within a macro instance script, the material slot name of the input mesh is not transferred. On the generated mesh output, the material slot name is "None" ...
Shadows are Heavily Aliased with PCSS Enabled
UE - Graphics Features - Apr 11, 2019Shadows are exetremely rough and aliased if r.shadow.FilterMethod is set to 1. Working as expected in 4.21 CL# 4753647 Found in 4.22 CL# 5660361 and 4.23 CL# 5810496 ...
Vulkan bloom convolution causes crash
UE - Rendering - Architecture - RHI - Jul 6, 2021Ensure condition failed: Layout == VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR || Layout == VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL || Layout == VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_RE ...
Instances Created From Merge Actor Have Corrupt Lightmaps
UE - Graphics Features - Jun 6, 2019Instances Created From Merge Actor Have Corrupt Lightmaps. Working as intended in 4.20 CL# 4369336 and 4.21 CL# 4753647 Found in 4.22 CL# 6574378 and 4.23 CL# 6842436 This is a regression. ...