Unreal Engine Issues
Unreal Engine Issues
NDisplay hangs and stops responding on cluster event send
UE - Virtual Production - nDisplay - Nov 12, 2019"The test event is set up using the default CE port, but every time an event is sent through the launcher the display receives the input and processes it, however the launcher will "hang" and stop ...
PlayerController isn't tickable during pause while using the 'Set Tickable When Paused' node
UE - Gameplay - Jun 18, 2015PlayerController isn't tickable during pause while using the 'Set Tickable When Paused' node. https://answers.unrealengine.com/questions/243791/camera-ticks-but-does-not-update.html User Descriptio ...
NPC - Instances does not get updates from changes to the parent Niagara Parameter Collection in the editor
UE - Niagara - Oct 4, 2024When an Niagara Parameter Collection (NPC) is selected as the parent Collection for an NPC Instance (NPCI), all of its current parameters are carried over to the NPCI with their current values as th ...
Client PlayerState is null on joining online session
UE - Networking - Jul 31, 2015APlayerController::ClientStartOnlineSession() checks PlayerState at the start of a game after loading a level. Due to time needed to load in, client player state may may return NULL ...
Rearranging the position of enumerators in an Enum BP will change references to the enumerators inside Data Tables based on position rather than value
Tools - Nov 12, 2015Rearranging the position of enumerators in an Enum BP will change references to the enumerators inside Data Tables based on position rather than value. Reproduced in 4.8.3 binary, 4.9.2 binary, 4.1 ...
Hierarchical LODs used with Precomputed Visibility cause actors to occlude that should not behind translucent materials
UE - Graphics Features - Jul 6, 2016When using Precomputed Visibility in conjunction with HLODs and translucent materials without them culling actors occluded by the translucent material. The example gif attached shows that the base ...
Crash occurs when opening a Blueprint that contains a variable that is of a type of a child of the Blueprint, as well as a component containing instanced UObjects
UE - Gameplay - Blueprint - Dec 23, 2016A crash that is possibly the result of a circular dependency can occur if a Blueprint containing an ActorComponent with instanced UObjects and a variable that is a type of a child of itself is opene ...
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 ...
Children of editor-only actors do not maintain correct transforms when placed inside level instances for PIE and cooked builds
UE - World Creation - Worldbuilding Tools - Level Instances - Oct 20, 2025We have found an issue where children of editor-only actors get wrong transforms in PIE and cooked builds when placed inside level instances. This affects both engine version 5.5 and 5.6. The issue ...
Renaming a Blackboard Key removes it's references in the Behavior Tree
UE - AI - Jan 27, 2015Renaming a Blackboard Key removes it's references in the Behavior Tree ...