Unreal Engine Issues
Unreal Engine Issues
Missing SmallOSAlloc/Free memory tracking with LLM on iOS
UE - Platform - Mobile - Dec 11, 2020Licensee reports missing memory tracking for LLM on iOS: In Engine/Source/Runtime/Core/Private/HAL/MallocBinned.cpp in SmallOSAlloc, there is a compiler define for IOS and within it there is an LLM ...
Calling RemoveAllAnchors function on a non-clustered geometry collection falls extremely fast
UE - Simulation - Visual - Feb 8, 2023Non-clustered geometry collections applied RemoveAllAnchors are not put into FPBDRigidsSOAs::DynamicGeometryCollectionArray, so acceleration is not reset every tick and they fall super fast. The fol ...
Default subobject of dynamic component skips initial replication
UE - Networking - Sep 11, 2024Because the component's subobjects are replicated before the component, the content block for the subobject is received before the component has been created on the client. Since this subobject is c ...
Physics Constraint doesn't hold if one Component is used for constraint
UE - Simulation - Physics - Jul 22, 2015Physics Constraint doesn't hold if one Component is used for constraint User Description: Hello, I recently updated the project from 4.7.6 to 4.8.2 and the physics constraint don't seem to work an ...
EventOnMouseLeave Is firing off when it should not
UE - Editor - UI Systems - Apr 13, 2015If the user clicks on the spin box that has an On Mouse Leave event and then drags the mouse around the leave event will fire off as if the mouse position is still being updated to the screen (the m ...
The Editor will crash on load if a class contains a CanvasRenderTarget2D that is set using CreateCanvasRenderTarget2D.
Tools - Oct 23, 2014Adding a CanvasRenderTarget2D* UPROPERTY to a class and setting it using CreateCanvasRenderTarget2D will cause the Editor to crash on load. CRASHREPORT: [Link Removed] UDN: This was also reported ...
BoneList and BoneFilterActionOption in LOD0 of LODSettings are displayed after editing other LOD level
UE - Anim - Runtime - Jul 31, 2023BoneList and BoneFilterActionOption in LOD0 of LODSettings are filters by the following code. void FSkeletalMeshLODSettingsDetails::CustomizeDetails(IDetailLayoutBuilder& LayoutBuilder) { ... st ...
Changing per layer parameters in a layered material that writes to RVT can cause temporary visual corruption
UE - Rendering - Architecture - Sep 12, 2025When using a layered material that writes to a runtime virtual texture. Sometimes when modifying a layer parameter in the material instance editor. The cached material data in the runtime virtual ...
Changing root component in C++ does not apply correctly to map placed actor instances
UE - Gameplay - Jan 4, 2023Edit: Please investigate for not only root component changes, but native component hierarchy changes in general and whether those hierarchy changes apply to actor instances saved as part of maps. O ...
IsSpatiallyLoaded = false set in actor blueprint is not respected in standalone game
UE - World Creation - Worldbuilding Tools - World Partition - Jul 1, 2024In past compatibility detection in FWorldPartitionClassDescRegistry::PrefetchClassDescs, as AssetRegistry.TryGetAssetPackageData returns UE::AssetRegistry::EExists::Unknown in standalone games, so t ...