Using a fixed frame rate will cause you to leave the loop section of Montage.

UE - Runtime - Animation - Dec 10, 2021

This problem only occurs when the fixed frame rate is 30 and the Sequence Lenngth of the loop animation is 1.66667. If turn off the fixed frame rate setting, it will behave as it should. ...

Variable can't be set by the Pick Actor From Scene eye dropper if that actor's name starts with an underscore "_"

UE - Editor - Dec 6, 2022

This is a regression. Tested in //UE5/Release-5.1 CL20979098 Variable can't be set by the Pick Actor From Scene eye dropper if that actor's name starts with an underscore "_". ...

UDN Bug: ASTC compression becomes greyscale

UE - Anim - Mutable - Feb 13, 2025

Bug reported at https://udn.unrealengine.com/s/question/0D5QP00000tOpXN0A0/using-mutable-plugin-results-in-greyscale-textures-on-android-xr?fromCase=1 ...

GlobalShaderCache file is missing when Direct X 11 SM5 is disabled for packaging

UE - Graphics Features - Nov 16, 2016

When trying to launch a .exe after disabling SM5 in the project settings, an error will appear. The global shader cache file ../../../../Engine/GlobalShaderCache-PCD3D_SM5.bin is missing. ...

Set Morph Target not being sent to children of Inherited Mesh

OLD - Anim - Sep 4, 2015

In previous versions of UE4, Set Morph target to call the Inherited Mesh and would result in any children of the Inherited Mesh that shared that morph target name to morph. In UE4.9 this no longer ...

Crash when removing Blueprint function

UE - Gameplay - Blueprint Compiler - Apr 23, 2018

The Editor crashes whenever the reference to the "DeleteThisFunction" function is deleted. ...

A Blueprint created from Actors in the level does not preserve the relationship (hierarchy and transforms) of both components

UE - Gameplay - Blueprint - Aug 11, 2015

A Blueprint created from Actors in the level does not preserve the relationship (hierarchy and transforms) of both components. Reproduced in 4.8.3 binary, 4.9 Release (//depot/UE4-Releases/4.9/Prom ...

Extra Game Mode frames are rendered between Shots

UE - Anim - Sequencer - Oct 17, 2016

Extra Game Mode frames are rendered between Shots Regression: YES Worked: 4.13.1 CL:3142249 Broken: 4.14 Releases CL:3164219 ...

In the DragForce module drag amounts greater than one can accelerate the particle instead of slowing it down.

UE - Niagara - Jun 10, 2019

Drag force allows for values greater than 1, which can cause the drag force to exceed the initial velocity, which will continue to compound until a NaN is reached or the particle's lifetime is up. ...

USD Stage is not available on Mac and Linux

UE - Editor - Content Pipeline - Import and Export - Dec 17, 2019

On Mac and Linux the option to open the USD Stage window is not there like it is on Windows. This is not a regression since USD Stage was not preset in 4.23.1 (CL-9631420) on any platform. ...