Crash upon adding an Interface to a Blueprint that has a function name that matches the name of a variable in the Blueprint.

UE - Gameplay - Blueprint Compiler - Oct 13, 2017

When you add an Interface to a Blueprint that contains a variable with the same name as one of the Interface's functions, the editor will crash upon compiling the blueprint. In 4.16, this only cause ...

Unable to use Steam Sessions with a source built editor from Github

UE - Networking - Jul 25, 2018

Steam sessions are unable to be found in packaged games that use a source built editor from Github. According to users, this is related to the BuildId not being set properly so the packaged games ar ...

NormalizePackageNames() should interpret 'exclude developer folders' to also exclude packages in ExternalActors and ExternalObjects

UE - CoreTech - Oct 14, 2022

In NormalizePackageNames() (PackageUtilities.cpp), there is a PackageFilter parameter, which can be set to exclude developer packages (NORMALIZE_ExcludeDeveloperPackages). The code only checks the b ...

Disabling Grid ShowFlag also hides billboard sprites and volume outlines

UE - Graphics Features - Nov 8, 2023

The following odd behavior did not happen until UE 5.2, but happens in the latest UE 5.3. When the "Grid" show flag is disabled in the Level Editor Viewport, all billboard sprites and volume outlin ...

Crash when using VR Mode with Extra Viewports and a Camera Actor

UE - Editor - Workflow Systems - Jul 6, 2019

From User: "Normally UE4 has an "Eject" button which is great for live-debugging your app, because you can see everything that's happening in your world, and see the World Outliner in realtime whil ...

Nativization of Blueprint Subclass of PlayerStart fails

UE - Gameplay - Feb 23, 2018

Fail to package with nativization. cannot convert from 'USceneComponent *' to 'UBillboardComponent ...

Mobile VR - Foliage (HISM) crash

UE - Platform - XR - Jun 7, 2019

HISMs cause mobile VR app to crash. Confirmed in 4.23 MAIN @ CL 6829265 ...

Inputs and Outputs missing in Details pane on Interface function that has been transferred to local function

UE - Gameplay - Blueprint - Aug 12, 2015

After removing an interface from a blueprint, any interface functions in the blueprint can be transferred to a local function. However, after this occurs, the inputs and outputs are removed from the ...

The Delay node cannot be added to the StandardMacros bp in the Engine folder

UE - Gameplay - Blueprint - Jan 19, 2015

The Delay node cannot be added to the StandardMacros bp in the Engine folder. However, the Delay node can be added to a new Macro Library bp and any Macro in an actor class blueprint. ...

Editor crashes when importing 4.5.1 project to 4.6

UE - Gameplay - Blueprint - Dec 9, 2014

The user converted a copy of their 4.5.1 project to 4.6. Upon opening that project, the editor crashes. Deleting certain widgets allows the user to open the project, but opening any map results in a ...