Unreal Engine Issues
Unreal Engine Issues
Can change type of event dispatcher in Blueprint
UE - Gameplay - Blueprint Editor - Oct 2, 2018It seems that with 4.20 users are able to change a dispatcher's type from Multicast Delegate to something else (float, int, etc.) Doing so will cause any node that references the dispatcher via call ...
Child Blueprint construction script runs before parent C++ OnConstruction
UE - Gameplay - Jun 25, 2019When the order of construction is backwards it makes it impossible to have native objects set up components in OnConstruction, that a child BP Construction Script then has access to. Sometimes the C ...
Unable to delete levels with Particles in them
UE - Gameplay - Oct 9, 2019The engine is unable to Level that has a Blueprint actor with a child actor component that has a particle system component. The follow message pops up: World /Game/LevelName.LevelName is in use. — ...
Potential Memory Leak when frequently terminating and re-initializing FConstraintInstance
UE - Simulation - Physics - Mar 29, 2022From User: When frequently terminating and re-initializing the FConstraintInstance, there appears to be a leak when cleaning up the disabled joint, which leads to an ever growing list that gets sort ...
SetOneWayInteraction functionality has no effect on the simulation
UE - Simulation - Physics - Nov 11, 2022Calling SetOneWayInteraction on a BodyInstance has no effect within the physics engine. The state of the flag is passed in to Chaos but nothing actually uses the value once it is there. It is expe ...
[Interchange] Crash on asset re-import
UE - Editor - Content Pipeline - Import and Export - Feb 7, 2025We've started seeing a crash in editor when re-importing one of our assets. <pre class="ql-syntax">Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 783] Array index out of ...
Switch on Gameplay Tag does not correctly register tag alterations in Standalone game
UE - Gameplay - Blueprint - Oct 5, 2015Switch on Gameplay Tag does not acknowledge changes to Gameplay Tag variable in Standalone game. ...
A Client cannot join a Server after setting a GameMode in the OpenLevel node's Options string
UE - Networking - Nov 23, 2015A Client cannot join a Server after setting a GameMode in the OpenLevel node's Options string. Reproduced in 4.9.2 binary, 4.10.0 binary, and Main (CL# 2776829) ...
Show 3D Widget for vector variable in a blueprint component does not correctly appear in blueprint viewport when implemented
UE - Gameplay - Blueprint - Aug 6, 2015Setting a vector variable to editable and showing a 3D widget within a blueprint actor component does not show the 3d widget within a blueprint implementing the component. ...
Timer significantly lowers FPS as compared to tick running the same function
UE - Gameplay - May 1, 2015Timers set to a low time setting, but that are not set lower than tick, have a significant impact on FPS as compared to tick when updated a large number of objects at the same time. ...