Unreal Engine Issues
Unreal Engine Issues
Collision Responses will reset to previous setting after changing the Preset Collision Profile
OLD - Anim - Mar 1, 2017Collision Responses will reset to previous setting after changing the Preset Collision Profile. After the change is made and "Accept" is pressed, the Collision Responses will still have the old ch ...
Modules with Emitter Life functioning incorrectly
UE - Graphics Features - Jan 7, 2016Setting the Emitter Time module with an emitter that is not set to loop will result in an incorrect render of the particles past the emitter duration. Emitter Duration set to 3 seconds:[Image Remov ...
StructUtils plugin's `FInstancedStruct` in a CPP-defined struct in a `TArray` on an actor component defined in CPP and implemented in BP. Populating the instanced struct in an actor BP's class defaults breaks serialization of the class defaults.
UE - AI - May 30, 2025Context Instanced structs are great for holding simple data with the main advantage they have is a low memory overhead unlike instanced objects. Problem The problem is in StructUtils plugin's `FIns ...
'Moved' event pin doesn't trigger on the 'Input Touch' node correctly
UE - Editor - UI Systems - Apr 8, 2016'Moved' event pin doesn't trigger on the 'Input Touch' node correctly Regression: This does not happen in 4.10.2. The 'Moved' pin triggers at all times when the mouse-button is held and the mouse i ...
Slider Values are not working inside of a blueprint
UE - Gameplay - Blueprint - May 7, 2015Slider Values are not working inside of a blueprint in 4.8 Preview 1. User Description: Problem with the numeric float/int boxes in the editor in Blueprints, if for example open the TPS Template a ...
Material parameters flickering due to UMG animation switching and multi-threaded execution
UE - Editor - UI Systems - UMG - May 12, 2026When continuously transitioning to UMG animations that have a track targeting the same material parameter within the UUserWidget::OnAnimationFinished event, the number of source inputs to UMovieScen ...
Assert caused by using FText::FromStringTable to initialize a FText property in the constructor of a UStruct based off FTableRowBase
UE - Foundation - Core - Jan 4, 2019When using FText::FromStringTable to initialize an FText variable in the constructor of an FStruct that inherits from FTableRowBase, an assert is caused due to recursion. The assert is as follows:As ...
Auto Convex collision generation doesn't work in some instances the accuracy setting
UE - Gameplay - Jun 18, 2015The new auto-convex collision generated (V-HACD) will not work properly with some meshes to generate accurate collision. Using a rounded single piece mesh the accuracy setting will not work at all ...
Ensure triggered inside Range Struct Customization when Property Node is no longer valid (e.g. when editing FFloatRange while FRuntimeFloatCurve editor is visible) [Ref. UE-341339]
UE - Editor - Verse Class Editor - Nov 12, 2025[Link Removed] Closed was fixed by CL 46990575, successfully avoiding an ensure condition inside FIntervalStructCustomization::S ...
Attached Project Crashes While Opening After Conversion From 4.10 to 4.11
UE - Foundation - Core - May 3, 2016The attached project is now crashing after being upgraded from 4.10.4 to 4.11.2. This crash also occurs when attempting to open a copy of the project in 4.12 Preview 1. After further investigation ...