Unreal Engine Issues
Unreal Engine Issues
Editing a blueprint from a hidden streamed level can reset all actor transforms
UE - Gameplay - Blueprint - Jul 9, 2015When editing an actor blueprint that's inside of a hidden streamed level, the blueprint actor transform will reset to 0,0,0. There is a video that's attached to the AnswerHub post which is very use ...
LevelEditor: "Replace Actor" marks level as dirty even when using external actors
UE - Engine Scaling - Streaming - Jul 15, 2024When using external actors, adding/removing/replacing/editing an actor instance inside a level does not cause any modification to the Level package, which helps reduce contention for the map file on ...
ISM + WPO = broken motion vectors?
UE - Rendering - Features - Nov 5, 2024Instanced Static Meshes will have incorrect velocity if a Material uses World Position Offset. Fixed WPO in a material causes significant velocity on the ISM. This was also replicated in //UE5/Rele ...
ForEachLoop does not save structure changes in the loop body
UE - Gameplay - Blueprint - Feb 2, 2015If a ForEachLoop node is used to cycle through an Array of Structures, using the Array Element output of the Loop node to set the members of the structure does not save the changed values. Workarou ...
Landscape Visibility Mask Rendering with Missing Landscape Components when Deployed to Mobile Device
UE - Graphics Features - Apr 8, 2015Landscape Material renders with missing components when using a 'Landscape Visibility Mask' and deploying to a mobile device. I have found this issue now with an Android and iOS device. I was able ...
Camera jitter when using Crane Rig with Look At
UE - Anim - Sequencer - Jul 21, 2016Camera jitter when using Crane Rig with a Cine Camera that is using the Look At Functionality ...
[CrashReport] UE4Editor_Slate!TAttribute<FText>::Get() [attribute.h:130]
UE - Editor - UI Systems - Slate - Jul 13, 2017This is a common crash affecting users in 4.16 User DescriptionsI imported an FBX and the editor crashed.alembic import from brekelwhats wrong with the ue4 alembic importer? Source Context 120 ...
empty default value for a blueprint member variable in a custom k2node
UE - Framework - Blueprint - Feb 9, 2024User is attempting to find a blueprint member variable's default value in their implementation of UK2Node::NotifyPinConnectionListChanged(). but the expected value in FBPVariableDescription is empty ...
Mass entities initializing fragments on the incorrect archetypes due to shared CreationContext
UE - Engine Scaling - Mass - Feb 3, 2026UMassAgentSubsystem::HandlePendingInitialization creates a single FEntityCreationContext that is reused across all iterations of the PendingAgentEntities loop. When SpawnEntities eventually calls in ...
Crash when exposing a TOptional<FName> or TOptional<FText> to the editor through a UProperty.
UE - Editor - Mar 25, 2025Support for editor-exposed uproperties of type TOptional<T> has been added by CL 28199740 on september 2023. However, since then until today in UE 5.5, a crash can happen when exposing TOptional<FNa ...