Inside a BP Interface, changing a Function output to an input will cause a compile error in the reference bp

UE - Gameplay - Blueprint - Apr 6, 2015

Inside a BP Interface, changing a Function output to an input will cause a compile error in the reference bp. [Error] "Graph named 'NewFunction_0' already exists in 'bpActor'. Another one cannot be ...

Calling SetupAttachment/AttachToComponent with 'this' as the parent inside a USceneComponent subtype's C++ ctor for nested component subobjects will result in all instances of the nested default subobject trying to attach to the CDO at registration time.

UE - Gameplay - Nov 16, 2016

This occurs because the 'AttachParent' property is a UPROPERTY, and as a result when we create a new instance of a USceneComponent subtype, any USceneComponent subtypes it owns are treated as instan ...

Creating TArray of components does not allow component elements to be edited in blueprints

UE - Gameplay - Blueprint - Mar 8, 2016

When an array is used to declare actor components, the component elements that make up the array cannot be edited inside blueprints. ...

Action event in the blueprint graph leads to state dirty.

UE - Gameplay - Blueprint - Aug 9, 2017

BP state get dirty if the BP graph have action input event. Regression: Yes, it is not reproduced in 4.16.3 This issue is not related to Blueprint Compilation Manager. ...

Virtualized Silent Sounds "Pop" When Played With New Mixer

UE - Audio - Sep 27, 2017

-Could not reproduce and only happens in the project linked below -Tested in 4.16 and Preview 4.18 and this can not be heard -Does not look like the .ini file is the cause of the issue -Other soun ...

Construct object fails to assign a value when using the level blueprint - ConstructObject node issue

UE - Gameplay - Blueprint Compiler - Feb 28, 2018

https://udn.unrealengine.com/questions/419239/uk2node-genericcreateobject-compile-issue.html ...

"On List Selection Changed" Retrieves The Wrong Item When "Set Item Selection" is used.

UE - Editor - UI Systems - Jan 8, 2020

When a list view item in UMG is selected using "Set Item Selection" it will get the item of the first entry in the list or the last entry manually selected by the user. The correct item display nam ...

Unable to use OpenXR with non-Oculus Android platforms

UE - Platform - XR - Dec 1, 2022

From Licensee: In OpenXRHMDModule:473 (UE5.0) or OpenXRHMDModule:497 (UE5.1) the engine is checking if the app is packaged for Oculus Mobile, if it isn't the case the function returns false and the ...

Search in Blueprint can encounter a deadlock condition when the window is closed before the search finishes and an FText lookup is pending

UE - Gameplay - Blueprint Editor - Jun 19, 2024

When a running search in all blueprints is closed, it may prevent an AsyncTask used to return the look up FText's from StringTables from running on the game thread, leading to a deadlock. When the ...

Pasting custom data floats from a text editor into a instanced static mesh component crashes the editor

UE - Framework - Components - Aug 5, 2024

When an instanced static mesh component with a material using a PerInstanceCustomData node has its data floats pasted in, the editor crashes with an "Array index out of bounds" error. The licensee w ...