Quickly using alt-tab with a blueprint in a new window causes the event graph to capture input of the alt key

Tools - Nov 13, 2017

Quickly using alt-tab with a blueprint in a new window causes the event graph to capture input of the alt key. This issue does not occur when the blueprint is a tab of the main UE4 editor window. Th ...

Renaming native struct with redirect can break user defined structs

UE - Gameplay - Blueprint - Jul 18, 2018

From https://udn.unrealengine.com/questions/444690/redirecting-ustruct-used-as-member-of-userdefineds.html In 4.20 it was changed so soft object ptrs pointing to classes work correclty with +ClassR ...

Selecting multiple actors with differing DataTableHandles causes data loss

UE - Gameplay - Jan 4, 2021

The data table customization (and probably others) tries to aggressively clear out row references that are not valid in the table they point to. This breaks when selecting multiple actors or objects ...

Stride Warping in manual mode not activating correctly based on first StrideScale

UE - Anim - Gameplay - Aug 15, 2022

From licensee: If StrideScale is 1 the first time through, it initialises the StrideScaleModifierState to 1 and doesn't require updating so leaves the CachedDeltaTime at 0 by never calling Update_I ...

Pressed event triggered after calling FlushPressedKeys while holding the button

UE - Gameplay - Input - Oct 2, 2024

This is an issue related to the behavior of the FlushPressedKeys function when called manually while a button is held. Once the function is called in C++, a Pressed event gets triggered even though ...

Crash occurs after right clicking a Modify Curve node in an Animation Template Blueprint

UE - Anim - Jan 17, 2023

This is not a regression. Tested in //UE5/Release-5.0 CL20979098. The editor crashes when right clicking a Modify Curve node in an Anim Graph of a Animation Template Blueprint. ...

Cast Translucent as Masked in the Material Editor is no longer working

UE - Graphics Features - Apr 7, 2016

When enabling the option for Cast Shadow as Masked in the Material for a translucent object the shadow is no longer baked when building lighting. Using Stationary or Static Lighting will give the sa ...

Compiling any material in UE 5.5.1 without ShaderCompiler JobCache results in a crash

UE - Rendering Architecture - Shaders - Jan 15, 2025

Compiling any material with r.ShaderCompiler.JobCache=0 causes ShaderCompileWorker to crash. Reproduction steps cause a crash during Editor startup, but this bug may affect other scenarios where mat ...

MediaFramework movies not playing properly in Shipping

Media Framework - Nov 7, 2017

`check(Samples.Pop());` this kind of `Pop()` inside of a `check()` is in a few places in MediaSampleQueue.h and MediaSamples.cpp but `check()` expands to nothing in Shipping/Test, so, required work ...

Data validation FAILED due to IWBE_Blutility containing invalid data

UE - Content - Engine - Jan 11, 2021

4.26[AssetLog] D:\Binary\UE_4.26\Engine\Content\Tutorial\InWorldBlueprintEditing\TutorialAssets\IWBE_Blutility.uasset: Default__IWBE_Blutility_C is not valid. See the MapCheck log messages for detai ...