Cannot create Editor Toolbar Button with the name "Button"

Tools - Apr 19, 2017

The plugin fails to be created with the name "Button". The name button or BUTTON works as a plugin name. If there are some names that plugins cannot be called, then an error/warning message in the o ...

[UDN - 16673100] Calling FComponentVisualizer::NotifyPropertyModified() on a FInstancedStruct property loses all data inside because the PreviewActor spawns with default properties in the FInstancedStruct

UE - Editor - Workflow Systems - Jan 15, 2025

We found a problem with the component visualizer system and the PreviewActor in the Blueprint editor. If your component is using a FInstancedStruct in anyway, either directly, in a TMap, or TArray, ...

Crash when double-clicking landscape editor splines point tangent

UE - Graphics Tools - Terrain - Landscape - Apr 11, 2023

When double click splines point tangent, the editor will crash.  This issue related to [Link Removed], it didn't care about double-click case. Workaround: void FEditorViewportClient::ProcessDoubl ...

[Feature Request] Improve FExtensibilityManager to afford better specialization of context types

Tools - Oct 11, 2016

Currently FExtensibilityManager assumes that all extensibility is going to operate on TArray<UObject*>. Moving forward, we want to be able to supply custom, domain-specific context information to e ...

ARKit GetCurrentFrame crashes app

UE - Platform - XR - Aug 22, 2018

Using "GetCurrentFrame" crashes app. "The crash is due to the default constructor of FAppleARKitFrame being called by the above mentioned blueprint function. That constructor fails to initialize fi ...

The Blueprint compiler is not consistent with UHT when generating DefaultToInstanced variables

UE - Gameplay - Blueprint Compiler - Sep 7, 2023

UnrealHeaderTool and the Blueprint compiler generate inconsistent metadata for object reference variables whose underlying class type includes 'DefaultToInstanced' metadata. UnrealHeaderTool-genera ...

When the Initial Position of an Animation Asset is entered outside the expected range, the animation gets stucked and does not refresh.

UE - Anim - Runtime - Mar 18, 2024

The animation gets "corrupted" when the Initial Position value has an invaildad value. In this case, this means that the Initial Position value is outside the range of the duration of the Animation. ...

Changing case of characters in certain fields does not save the change

Tools - Nov 26, 2018

Capitalization of Struct variable names, Blackboard key names, Enumeration names and other various fields cannot be changed without changing other parts of the variable to completely change it. Simp ...

DataTable::LoadStructData allocating wrong size

UE - Foundation - Core - Oct 5, 2016

Pointed out by a licensee here: UDataTableを読みこんだ際のメモリ破壊について When reading the `UDataTable, in DataTable::LoadStructData()` the contents of the struct are interpreted[Image Removed], but the size of ...

Searching for gameplay tag variable values in the blueprint details panel returns no results

UE - Framework - Blueprint Editor - Feb 25, 2025

The expected behavior is when searching for a gameplay tag value in the blueprint details panel, you will find the matching gameplay tag you are searching for. The actual behavior is when searching ...