Unreal Engine Issues
Unreal Engine Issues
CommonUI Analog Cursor + Enhanced Input triggers cause Gamepad Face Button Bottom triggers to get stuck when alt-tabbing
UE - Gameplay - Input - Jun 18, 2024Reproduction rate: 5/5 Regression check: No, this also occurs in 5.4.2. Please note that this issue only reproduces with the Gamepad Face Button Bottom and does not occur for any other gamepad butt ...
External Actors can hold stale references to Blueprint classes as edited instance properties
UE - Engine Scaling - Streaming - Nov 14, 2024When a component is removed from a class that exists as an instance with external actors enabled, a deleted BP component on an actor will remain referenced by the instance. Disabling External Actor ...
Nanite mesh not culled when owner is editor only actor in gameview
UE - Rendering - Features - Nanite - Mar 29, 2024Nanite mesh is not culled because "DrawInGame" value in the primitive uniform buffer is always 1. Can be fixed with below modification:// in FPrimitiveSceneProxy::FPrimitiveSceneProxy DrawInGa ...
Missing materials on the rear lights and windows of library vehicles
TM - Content - Oct 24, 2025Reported in SF [Link Removed] The rear light material and window materials on Twinmotion library vehicles are not present on many vehicles in TM 2025.2. Confirmed affected vehicles are in the foll ...
UInstancedStaticMeshComponent::AddInstances does not appear to be adding per-instance previous transforms when enabled
UE - Rendering - Features - Dec 3, 2025Instanced static mesh component does not add instances transforms to PerInstancePrevTransform array when using UInstancedStaticMeshComponent::AddInstances. Additionally Updating the transforms of th ...
UMG Viewmodel Plugin -- When setting up View Bindings, several arithmetic and comparison functions are missing from the "Conversion Functions" list
UE - AI Workflows - UI Systems - UMG - Mar 20, 2026When setting up View Bindings from the "UMG Viewmodel Plugin" on a Widget Blueprint, it is possible to select a compatible "Conversion Function" from the list of available bindings. By default, the ...
Ensure When Pasting Timeline Node that was Previously Connected to a Node into a Function
UE - Gameplay - Blueprint - Nov 4, 2016An ensure is occurring when pasting a timeline that was once connected to a node into a function in blueprint. Regression: No, this also occurs in 4.12.5. ...
Failed to register input back buffer crash when opening a project with PixelStreaming on Windows 7
PixelStreaming - Sep 19, 2018Projects crash upon opening with the PixelStreaming plugin enabled. ...
Changing hierarchical instanced meshes' transforms on tick spams output log with warning
UE - Graphics Features - May 27, 2015When several Hierarchical Instanced Mesh Components are spawned and then their transform altered on tick, the log is spammed with the message: LogStaticMesh:Display: Discarded foliage hierarchy of ...
Changing the scale of the widget reflector makes it harder to select actors in the viewport
Tools - Dec 29, 2014When changing the scale of the widget reflector it changes the scale of the selection bounds of actors in the viewport. Example: When hovering over a box at a 2.0 scale I will select the wall someti ...