Unreal Engine Issues
Unreal Engine Issues
Improper Initialization of trigger values when added at runtime with the key pressed already
UE - Gameplay - Input - Nov 11, 2022See the comment on UInputTrigger::LastValue around issues being a bool type on first tick ...
Transform Origin Scale on the Level Sequencce Actor's Instance Data can affect rotations
UE - Anim - Sequencer - Apr 30, 2025Scale is used as part of the rotation calculation for transform multiplication, and it can have an effect in the sequence transform origins. It's expected that scale is completely ignored, and shou ...
Painted foliage in a level instance can be selected in Foliage mode if the level instance is in main level, and foliage is duplicated if moved.
UE - World Creation - Worldbuilding Tools - Foliage - Sep 16, 2025Context Foliage Mode is a set of tools that enables you to quickly paint or erase sets of Static Meshes or Actor Foliage. Level Instancing is a level-based workflow designed to improve and streamlin ...
Preformance drop when calling draw to render target
UE - Graphics Features - Jun 19, 2018There is a major performance drop after 4.18 when calling draw material to render target. This is an issue reported by many community members, and there seem to be additional reports with different ...
Spline Mesh Collision doesn't work in packaged game when spawning them at runtime
UE - Simulation - Physics - May 18, 2020Spline Mesh Components lose their collision in a packaged game when spawning them at runtime, or modifying them via 'Set Start and End' function at runtime. ...
Editor preview safe zones for notched iPhones do not match those used at runtime
UE - Platform - Apple - Dec 4, 2020Hi, on iOS we ask the device for its cutout regions, but the values returned by the device can be overridden using the SafeZone.Landscape.* cvars. However these are on-device only settings. When th ...
Reparenting an actor BP to EditorUtilityActor does not give access to editor utility nodes
UE - Framework - Blueprint Editor - Jul 11, 2022Ran into this while answering a UDN. A user was expecting to find the blueprint functions available to Editor Utility Blueprints after reparenting their actor to EditorUtilityActor. I confirmed that ...
Undoing parent deletion creates duplicate child actors
UE - Framework - Blueprint - Jul 29, 2022Undoing the deletion of an actor with a child actor component added via the details panel (IWCE) duplicates the child actor and the hierarchy is incorrect in the scene outliner. This seems to only h ...
Allow users to keep files they have submitted themselves and still sync forwards
UE - Foundation - UGS - Mar 30, 2023UGS displays a prompt if syncing to latest would sync back before changes the user submitted themselves. It would be nice to allow them to keep their own files at least. ...
GAS: Initial OnRep_SpawnedAttributes from DefaultStartingData clears attribute values for already replicated ActiveGameplayEffects
UE - Gameplay - Gameplay Ability System - Oct 23, 2024Context The property 'DefaultStartingData' in AbilitySystemComponent can be configured from blueprint to spawn default attribute sets. This happens OnRegister. For runtime spawned actors like pawns ...