Packaged project crashes when playing sound from blueprint library with enum input after nativizing blueprints

UE - Gameplay - Blueprint Runtime - Aug 23, 2016

Packaged project crashes when playing sound from blueprint library with enum input after nativizing blueprints. Frequency: 5/5 Notes If nativize blueprints is turned off, the packaged project wor ...

LOD ScreenSize per platform is not reflected in the mobile preview

UE - Platform - Mobile - Jan 31, 2023

in 5.0 or 5.1, MinimumLOD  per platform can be previewed in the mobile ES3.1 preview mode, but It seems that the LOD ScreenSize per platform is not reflected in the mobile preview. ...

State Machine Variable Type Icons Display in the Color White

UE - Anim - Runtime - May 4, 2022

Occurs 5/5 times State machine variable type icons all display in the color white.  Regression does occur - tested in //UE4/Release-4.27.2 EGL Live @ CL18319896 ...

Data Validation Is Not Detecting References Correctly in Third Person Template When Assets Are Migrated

UE - Editor - May 12, 2022

Occurs 5/5 times Data Validation is not detecting soft references correctly in the TPS template.  Regression does occur as tested in //UE4/Release-4.27 @ CL 1831986 EGL Live. ...

Local lights appear broken when baking lighting with GPU Lightmass

UE - Graphics Features - Jun 2, 2025

Encountered an issue where local lights appear to be broken when baking lighting with GPU Lightmass. See screenshots attached. Tested regression in //UE5/Release-5.5 @ CL40574608 and the issue does ...

Nativized packaging fails when attaching paper Flipbook component to a parent paper Flipbook component that is Inherited.

UE - Gameplay - Blueprint - Jan 8, 2019

Nativized packaging fails when attaching paper Flipbook component to a parent paper Flipbook component that is Inherited. ...

Opening particle system crashes editor

UE - Graphics Features - Jan 27, 2016

Opening a specific particle system crashes the editor. If the particle system is used within a level and the level is played, the editor will crash with no callstack. Logs are attached. Frequency: ...

User is able to merge a single actor

UE - Gameplay - Aug 5, 2016

User is able to merge a single actor using the Merge Actor tool. This is a regression as you could not merge a single actor in 4.12. Not sure if this was an intended change or not. Occurring in 4. ...

Inaccurate updates to root widget visibility binding

UE - Editor - UI Systems - Apr 6, 2017

Inaccurate updates to root widget visibility binding, so far in my testing, this does not affect the functionality of the binding. Regression: affects 4.13.2, 4.14.3, 4.15.1 binary versions ...

Attempting to add or alter custom functions in character blueprint crashes editor upon compile

OLD - Anim - Aug 27, 2015

Editor crashes when adding or adjusting functions within character blueprint. Frequency: 5/5 Crashreporter: N/A Note: Does not reproduce on a new character blueprint, this seems limited to a cha ...