Rotated component made into root displays incorrectly in the blueprint editor

UE - Gameplay - Blueprint - Jan 25, 2017

Rotated component made into root displays incorrectly in the blueprint editor. Closing and reopening the BP editor corrects the displayed root component. ...

EObjectTypeQuery array nodes break when changing Object Channels in Project Settings

UE - Gameplay - Blueprint - Aug 18, 2017

When an object channel is deleted in Project Settings, any EObjectTypeQuery array becomes broken due to the array size shifting. Additionally: Enums can change when adding new Object Channels after ...

Editor vs Runtime: Inconsistent data layer behavior when attaching actors

UE - World Creation - Worldbuilding Tools - World Partition - Jun 5, 2025

In editor, data layer system respects the data layer settings for each actor, but at runtime, the condition check is made collectively for each actor cluster, resulting in differences in behavior. ...

Changing a value inside a struct exposed to blueprints removes struct from blueprints and gives error upon compiling and saving blueprint

UE - Foundation - Cpp Tools - Hot Reload - Sep 28, 2015

If a user creates a C++ class that contains a struct and references that struct within a blueprint, making any changes to the struct within C++ header file will prevent the user from saving the blue ...

Mouse loses focus after setting show mouse cursor to true and clicking anywhere on screen

UE - Gameplay - Input - Nov 17, 2014

If the mouse is toggled to show by using "Set Show Mouse Cursor" and then the user clicks in the window the mouse will lose focus (the camera will no longer freely track the mouse) ...

No log files are being created for Windows Shipping builds

Tools - Dec 26, 2014

When you package a project for Windows Shipping, The project will not generate a log file when the .exe project is played. The project will generate a log file if you package the project in the De ...

Up Ratio on the Gear Setup for Vehicle Movement Component does not work correctly

UE - Simulation - Physics - Sep 11, 2015

When changing Up Ratio for the Gear Setup in a Wheeled Vehicle's Vehicle Movement Component, there are some weird results. At 1.0 for Gear Setup, the gear should shift once RPM is at max but it will ...

Delegation issue with copied instances of a Trigger BP that is based off of the StaticMeshActor

UE - Gameplay - Blueprint - May 13, 2015

Delegation issue with copied instances of a Trigger BP that is based off of the StaticMeshActor parent class. If bp Trigger A is placed into the level and then 2 copies are made (B & C), when C i ...

Using 'Show Collision' in an execute console command node is crashing a packaged project.

UE - Graphics Features - Mar 30, 2015

When packaging a project for any platform, If you have 'Show Collision' in an Execute Console Command, you will see the project crash once it is packaged. Log files from the crash have been attach ...

Data is not filled in for a Blueprint struct array contained within another Blueprint struct

UE - Gameplay - Blueprint - Mar 6, 2017

If a Blueprint struct contains a variable that is an array of another Blueprint struct, data in a datatable based on the first struct will not be correctly filled in for the struct array. If the str ...