Unreal Engine Issues
Unreal Engine Issues
Crash duplicating or deleting any component inside of Actor BP if lights or triggers are present
UE - Gameplay - Blueprint Editor - Apr 25, 2017When duplicating or deleting a component whilst a point light is also a component within an Actor BP, the editor crashes. See callstack for info. This is a regression. Working: 4.15.2 Broken: 4.16 ...
Float Curve that is set as a local variable in an actor's function is garbage collected when in Standalone, causing a crash
UE - Gameplay - Blueprint - Sep 9, 2016If a Curve Float local variable is created for a function, it will be garbage collected when garbage collection occurs. This causes the process to crash due to an null pointer error whenever it is r ...
Saving Behavior Tree with Blueprint task inheriting from native class invalidates Blackboard key when BP contains a function
UE - AI - Jul 8, 2025A regression introduced in UE 5.6 causes Blackboard key selectors in Blueprint tasks to become invalid when the Blueprint inherits from a native subclass of UBTTask_MoveTo (or UBTTask_BlackboardBase ...
Emissive for Static Lighting discarded upon Re-opening Level or Restarting Project
UE - Graphics Features - May 24, 2016'Emissive for Static Lighting' discarded when restarting or re-opening a project. I discovered this issue while testing [Link Removed]. This issue does not occur in the binary 4.11 release so I hav ...
Build failure after nativizing any child Blueprint class with function override (regression).
UE - Gameplay - Blueprint - Jun 7, 2018Nativization regression in 4.20 preview 1. Cannot nativize overridden functions. Log Output:UATHelper: Packaging (Windows (64-bit)): D:/Projects/Unreal/NativizeMethod/Intermediate/Plugins/Nativized ...
Editor Crashes when creating a function in Child Anim Blueprint
OLD - Anim - Mar 16, 2017Editor Crashes when creating a function in Child Anim Blueprint. Regression: This issue did NOT occur in 4.13.2 Binary build ...
BP functions with enum-type input argument named 'Category' are erroneously assigned to category 'New Enumerator n'
UE - Gameplay - Blueprint - Jun 4, 2018BP functions with enum-type input argument named 'Category' are erroneously assigned to category 'New Enumerator n' ...
UE4Editor is crashing after user builds lighting
UE - Graphics Features - Lumen - Jul 22, 2020Issue reported by user that they are experiencing consistent crashes in UE4Editor have building lighting. ...
Crash enabling Stochastic Rect Light with Ray Tracing
UE - Graphics Features - Lumen - Oct 13, 2020Enabling Stochastic Rect Lights with Ray Tracing causes the project to crash. Reported and tested in version 4.26.0(CL 14419252). Tested and not found in version 4.25.3(CL 13942748). ...
No Set function for TextRenderComponent::VerticalAlignment variable
UE - Graphics Features - May 25, 2016There is no set function for the vertical alignment variable in TextRenderComponent.h meaning the variable must be set directly. This is inconsistent since there is the SetHorizontalAlignment() fun ...