Unreal Engine Issues
Unreal Engine Issues
Null FPhysicsActorHandle dereference in FBodyInstance::InitDynamicProperties_AssumesLocked when CreateShapes_AssumesLocked fails during async body init
UE - Runtime - Simulation - Aug 2, 2026Summary When CreateShapes_AssumesLocked fails during async body creation, the failed FBodyInstance is left in Bodies[] with a released actor handle. InitDynamicProperties_AssumesLocked is then called ...
When PCH is Disabled, Error Occurs in VulkanGenericPlatform.h at Android Build
UE - Graphics Features - Dec 6, 2018If disable PCH in Target.cs, an error will occur when building for Android. The log is as follows. LogPlayLevel: Error: D:/Build/Release-4_21_0/Engine/Source/Runtime/VulkanRHI/Private/Android/../Vu ...
Structs cause packaging to fail when Blueprint Nativization Method is set to "Inclusive"
UE - Gameplay - Blueprint - Apr 26, 2017Structs cause packaging to fail when Blueprint Nativization Method is set to "Inclusive" Note: Appears to be a regression (worked in 4.15.1) Error example: UATHelper: Packaging (Windows (64-bit)) ...
[CrashReport] Mac crash - UE4Editor-Slate.dylib!PrepassWindowAndChildren(TSharedRef<SWindow, (ESPMode)0>)
UE - Platform - Apple - Oct 27, 2017This Mac crash originally occurred in 4.15 around March 2017, then decreased in frequency during 4.16 and 4.17. It may be starting to trend again in 4.18. There is one record of this occurring in 4 ...
tvOS/IOS: Fails to Build with dSYM Options Enabled Due to DsymExporter Erroring Out
UE - Platform - Mobile - Jan 22, 2019When attempting to package for tvOS or iOS with the generate dSYM options enabled, numerous instances of the following errors occur:[2019.01.21-20.53.35:739][138]UATHelper: Packaging (tvOS): [2019 ...
"Landscape Layer" Doesn't appear in LandscapeMode even when the landscape is assigned a Layer-Based Material
UE - Graphics Tools - Terrain - Aug 19, 2026POST LINK: https://forums.unrealengine.com/t/bug-ue5-8-1-landscape-layer-doesnt-appear-in-landscapemode-even-when-the-landscape-is-assigned-a-layer-based-material/2745109 POST BODY:Summary[Bug][UE5 ...
NVIDIA 5080 GPU Crash when launching City Sample with DX12
UE - Graphics Features - Lumen - Apr 16, 2025UPDATE This issue no longer reproduces on driver versions 580.88 and higher. City Sample game crashes immediately upon opening with a NVIDIA 5080 with the latest drivers as well as some previous dr ...
DLC Package content isn't recognized when using RequestAsyncLoad
UE - Foundation - Core - May 24, 2016Attempting to load dlc assets with RequestAsyncLoad function results in the assets not being recognized. ...
ComponentOverlapMultiByChannel with a rotated simple collision PrimComp misses overlap vs. complex collision
UE - Runtime - Simulation - Nov 8, 2023UWorld::ComponentOverlapMultiByChannel and internally, the call to FBodyInstance::OverlapMulti, misses overlaps and blocking hits when the PrimComp's (the component used to test overlaps) mesh uses ...
Different Number of Frames imported from the same FBX between UE 4.8 and 4.9
OLD - Anim - Sep 14, 2015Using the same import settings in UE4.8 and UE4.9 will result in a different number of frames of an animation being imported from the same FBX file. If you import the same fbx animation which in M ...