Renaming a Named slot widget appears to clear any children in all other widgets that the named slot is used

UE - Editor - UI Systems - Aug 9, 2019

When changing the name of a named slot widget, it appear that any children contained in the the named slot (when the widget has been added to other widgets) will be cleared ...

'Hide Unconnected Pins' Button in the Blueprint Node Details Panel Disconnects SubPins with Connections

UE - Framework - Blueprint - Jan 14, 2026

Given a get node with a struct output, if "Split Struct Pin" is used on the struct and one of that struct's outputs are connected to another node, it does not count as a used pin when the base get n ...

Puzzle template blocks turn gray when hovered over in Code version vs no reaction in BP version

Docs - Samples - Feb 3, 2017

Functionality is different between code and bp versions of the puzzle template ...

Thumbstick clicks do not register on Linux

UE - Platform - Linux - Jun 6, 2017

The "Left Thumbstick Button" and "Right Thumbstick Button" events on Linux do not trigger with the thumbstick is clicked. Testing all gamepad input, clicking the thumbstick in appears to call the L ...

Replacing a UI widget element and then undoing it causes the Widget Blueprint's UI elements to be deleted on editor restart

UE - Editor - UI Systems - Jan 25, 2021

When using the Replace With option and then undoing it, upon engine restart the Widget Blueprint's UI components are all removed from the Widget Blueprint. It seems the undo is crucial to the issue, ...

Generated instances can not be cleaned up when PCGVolume is copied to a different level

UE - World Creation - Procedural Tools - May 19, 2025

Copying a PCGVolume beyond a level creates an instance that cannot be deleted. In UE5.5 or later, it is possible to delete the instance by pressing Cleanup button with Ctrl key (purge all components ...

Input disabled for all UMG when SetIsEnabled is called from code

UE - Editor - UI Systems - Mar 10, 2017

Calling SetIsEnabled on a UMG button in code will prevent any UMG input from being read (can't click other buttons/checkboxes, can't enter text into field, etc). Regression: No - code used does not ...

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 ...

Deleting console key does not persist

UE - Foundation - Core - Oct 23, 2014

When I go to the Input section of the Project Settings and change the key that the console is mapped to, when I restart the editor, there are now 2 bindings to the console. The default ~ mapping as ...