Unreal Engine Issues
Unreal Engine Issues
Always Relevant actor may replicate incorrect movement mode when the walkable floor becomes irrelevant
UE - Gameplay - Player Movement - Feb 26, 2024When the character class is set to always relevant, if a client travels very far away from another character, such that the character is relevant but the component they're standing on is not (but al ...
FBlackboardKeySelector filters aren't applied when recompiling blueprint if a behavior tree asset containing the blueprint added as a service is closed, or if the blueprint is reparented.
UE - AI - BehaviorTree - Sep 24, 2025Context In Behavior Trees, BT Services can be added to nodes. Those services can have configurable FBlackboardKeySelectors. BlackboardKeys are variables on a blackboard that the behavior tree can r ...
Parent component visibility in a child blueprint isn't reflected in a launched project.
UE - Gameplay - Blueprint - Mar 5, 2015Parent component visibility in a child blueprint isn't reflected in a launched/packaged project. ...
Planar Reflections Not Behaving As Expected in Splitscreen
UE - Graphics Features - Dec 19, 2018This occurs in //UE4/Main @ CL 4670176 Not a Regression. This is similar to https://jira.it.epicgames.net/browse/UE-59149 but when adding more player characters it seems to change the planar reflec ...
Using Delay with Tick when Paused doesn't work
UE - Gameplay - Blueprint - May 28, 2015Using a delay node in an event graph of actor using tick when paused will not work. It pauses the delay node. ...
Exponential Editor Slate Performance Cost When Editing An Asset With Nested Instanced Structs
UE - Editor - Feb 20, 2024UDN Issue: [Link Removed] ...
Physics Constraints do not have the same values if they are part of an 'Always Loaded' level
UE - Gameplay - Dec 3, 2014Physics Constraints do not have the same values if they are part of an 'Always Loaded' level. They will work correctly in the Persistent level and a level that is Streamed in. This becomes problem ...
Collision of child actor doesn't rotate if the parent is simulating physics
UE - Simulation - Physics - Aug 11, 2015Collision of child actor doesn't rotate if the parent is simulating physics. This was an old bug that an AnswerHub user reported back in 4.9 but now a licensee is reporting this same behavior in 4.1 ...
Hidden enumerator variables can cause the enumerator to become broken with the Select node in blueprints
UE - Gameplay - Blueprint - May 26, 2015If a user makes an enumerator in C++ and sets one of the variables to Hidden and doesn't make it the last variable of the enum, it will cause issues with the numbering of the enum when using the Sel ...
In Editor, Blueprint resources are not freed up when the Blueprint is closed
UE - Framework - Blueprint - Feb 16, 2024It appears that the preview scene used to render thumbnails is not destroyed after a thumbnail is rendered, even after the blueprint editor is closed and GC is run. Also found in Release-5.4, CL: 31 ...