Unreal Engine Issues
Unreal Engine Issues
Mouse click requires double click to enter input if "Set Input Mode Game Only" used
UE - Editor - UI Systems - Slate - Oct 3, 2016Mouse click requires double click to enter input if "Set Input Mode Game Only" used Regression (no) issue (does) occur in 4.12.5 Notes The first box selected will light up correctly the first time ...
Mobile MSAA breaks Modulated Shadows on OpenGL ES 2
UE - Platform - Mobile - Apr 2, 2018UPDATED DESCRIPTION When enabling Cast Modulated Shadows on a Directional Light and using Mobile MSAA on Android OpenGL ES 2, shadows from the Directional Light do not render when dynamic objects ar ...
BroadcastOnActorMoved is not being called
Tools - Feb 13, 2018In 4.18, BroadcastOnActorMoved() is no longer being called when an actor is moved in a level. The PostEditChangeProperty() function checks to see if the name of the property that was changed matches ...
BlueprintNativeEvent in Component Subclass does not show up in BP with the component
UE - Gameplay - Blueprint - Apr 20, 2015If a function is marked as BlueprintNativeEvent inside of a class that inherits from a component (Scene component, Actor component, etc) then the function cannot be called in a blueprint with the co ...
[CrashReport] Failed assert during BP compilation (trying to call a default delegate) (UE4Editor_KismetCompiler!FScriptBuilderBase::EmitFunctionCall() [kismetcompilervmbackend.cpp:1216])
UE - Gameplay - Oct 27, 2017This is a trending crash coming out of the 4.18 release. User DescriptionsI tried to call an Event Dispatcher (which is assigned in the Level Blueprint) in the Construction Script of the Blueprint ...
Hardware Lumen Surface Cache Artifacts on Nanite Geometry
UE - Graphics Features - Lumen - Sep 1, 2025When using Hardware Lumen with Nanite-enabled meshes in UE 5.6+, black / dark surface cache artifacts appear that result in generally darker and unstable lighting. These artifacts are not immediatel ...
When using StringToBytes() it returns an incorrect value
UE - Foundation - Core - Jan 4, 2018When using the StringToBytes() function it returns one less byte due to the -1 at the end of the return. The function takes a string and converts it to bytes but it always returns one less byte than ...
UMG property binding fixup for real numbers doesn't always work
UE - Editor - UI Systems - UMG - Apr 5, 2022For UMG delegates, we currently have a fixup pass that ensures that bound functions match the signature of the native delegate. However, the fixup appears to use the wrong function name, which cause ...
Duplicated blueprints cannot access casted class nodes
UE - Gameplay - Blueprint - Jun 15, 2015Duplicating blueprints that have 'cast to' nodes included in them display errors such as: "Could not find a function named 'AdjustShield' in 'worker_c'. Make sure 'worker_c' has been compiled for." ...
Default lux setting for ArchVis template causing render issue for 3d Widget blueprints and Materials set as "Unlit"
UE - Graphics Features - Jan 20, 2020The ArchVis template's default lux setting for the scenes directional light causes improper rendering on newly created materials and 3D widgets set to Unlit. Project attached with material made, s ...